Breaktru Forum

eCigarette Forum => Modding => Topic started by: Breaktru on December 08, 2012, 01:27:41 PM

Title: DNA20
Post by: Breaktru on December 08, 2012, 01:27:41 PM
Look what just came in the mail. For Beta testing

(http://breaktru.com/ecig/dna20_01.jpg)
(http://breaktru.com/ecig/dna20_02.jpg)

Now what to put it in   :Thinking:
Title: Re: DNA20
Post by: thetruckinggeek on December 08, 2012, 01:33:35 PM
Nice freebee ;cheers;
Title: Re: DNA20
Post by: styl3r on December 08, 2012, 03:45:31 PM
whats the physical size of the module Dave?
Title: Re: DNA20
Post by: CraigHB on December 08, 2012, 04:19:19 PM
Wow, that's a nice one.  I can tell the size from the tactile that's on it, that's a 6mm tactile so it's really small.  Amazing they can get 20 Watts out of it.
Title: Re: DNA20
Post by: Scottinboca on December 09, 2012, 08:36:18 AM
I wanted to stop by and see what you have planned for DNA20. I do think Breaktru whatever you put it in will be amazing!
Title: Re: DNA20
Post by: timesarerough on December 09, 2012, 03:57:11 PM
You should put the Zmax controller next to it so I can get a good size comparison.  :thumbsup:
Title: Re: DNA20
Post by: timesarerough on December 09, 2012, 04:01:00 PM
Now what to put it in   :Thinking:

It's designed for a tube mod....notice the menu function button placement on the opposite end of the controller as compared to the fire button?

Pretty hard to make a box mod with it and still have be comfortable to use.

Of course, you could just wrap the OLED around the board and have it display on the opposite side of the control and fire buttons?

Do I sense another Pactec enclosure is about to be used for a side-by-side comparison?  :applaude:
Title: Re: DNA20
Post by: Breaktru on December 09, 2012, 04:35:02 PM
It's designed for a tube mod....notice the menu function button placement on the opposite end of the controller as compared to the fire button?

Pretty hard to make a box mod with it and still have be comfortable to use.

Of course, you could just wrap the OLED around the board and have it display on the opposite side of the control and fire buttons?

Do I sense another Pactec enclosure is about to be used for a side-by-side comparison?  :applaude:

Actually I was looking at the adjust buttons and thought it would be a pain getting the alignment in a tube. Yes the display can be wrapped to the back.

The oLed display is the exact size of my MCU oLed DNA mod (viewable area). It is tiny and in a box like even the small Pactec, it may look lost. I may go even smaller.
Title: Re: DNA20
Post by: Breaktru on December 09, 2012, 04:59:18 PM
T, did you say size comparison?
See attached photos (viewable to members only)
Title: Re: DNA20
Post by: CraigHB on December 09, 2012, 05:34:17 PM
Man, that's one tiny display the DNA20 uses.  Would have to break out my magnifying glasses to read it.
Title: Re: DNA20
Post by: styl3r on December 09, 2012, 06:05:34 PM
How can they get that much power out of that does it glow in the dark :laughing2:
I'm sure you will do something breath taking as you always do......
Title: Re: DNA20
Post by: timesarerough on December 09, 2012, 08:33:40 PM
Man, that's one tiny display the DNA20 uses.  Would have to break out my magnifying glasses to read it.

You should see the video for it....geeez.

For real, you need some serious bi-focals to even read the display.

I think that Evolv probably made a really nice controller, but the display in gonna murder their sales.
Title: Re: DNA20
Post by: timesarerough on December 09, 2012, 08:42:11 PM
I may go even smaller.

SMALLER!?

Oooooh, are you hiding a secret enclosure big D?  :laughing:
Title: Re: DNA20
Post by: Breaktru on December 09, 2012, 09:32:49 PM
You should see the video for it....geeez.

For real, you need some serious bi-focals to even read the display.

I think that Evolv probably made a really nice controller, but the display in gonna murder their sales.

This is the same viewable screen size. What I did with the DNA12 w/ an oLed display is what the DNA20 display is about. Seeing all the data on one screen

(http://breaktru.com/ecig/mcu_dna_display2.jpg)
Title: Re: DNA20
Post by: Breaktru on December 09, 2012, 09:34:47 PM
SMALLER!?

Oooooh, are you hiding a secret enclosure big D?  :laughing:

I've made dozens with this box. It holds a High drain 18500
Title: Re: DNA20
Post by: Breaktru on December 09, 2012, 09:52:42 PM
Haven't fired mine up yet but I've heard that the board locks up when set to 10.1 Watts. New boards will be released with the fixed. Not sure if I'll be one of the lucky ones to get a new board. For now I'll keep it under 10w

Update: I guess I am lucky. Got the new board
Title: Re: DNA20
Post by: timesarerough on December 09, 2012, 10:26:40 PM
Did I ever send you one of those pistol grip enclosures, can't remember?

The CA8-0:

http://www.serpac.com/ca-series.aspx (http://www.serpac.com/ca-series.aspx)

It'll easily fit an 18650 in it, possibly 2 with your single board DNA.

It's an extremely comfortable enclosure though and having a trigger-type button would absolutely ideal comfort!

http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx (http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx)
Title: Re: DNA20
Post by: fsors on December 10, 2012, 12:58:44 AM
Did I ever send you one of those pistol grip enclosures, can't remember?

The CA8-0:

http://www.serpac.com/ca-series.aspx (http://www.serpac.com/ca-series.aspx)

It'll easily fit an 18650 in it, possibly 2 with your single board DNA.

It's an extremely comfortable enclosure though and having a trigger-type button would absolutely ideal comfort!

http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx (http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx)

Hey can I get one free dna 20 Dave?
Those enclosures look like the ones RocketM used Shek
Title: Re: DNA20
Post by: redwolfe on December 10, 2012, 01:53:03 PM
I can't wait to see what every one comes up with for the DNA20.
Title: Re: DNA20
Post by: Breaktru on December 10, 2012, 03:03:49 PM
This is the FIRST mini DNA20 mod to be built (12/08/12). It was made before Evolv released the chip for sale. Many modders have built one after the official release after Christmas of 2012.


The Wattage value is easy to read.

UPDATE: This is the FIRST Mod to use the Turnigy Nano-Tech Li-Po battery. Since I first started using it many modders have also used them.

(http://breaktru.com/ecig/dna20_build01.jpg)


(http://breaktru.com/ecig/dna20_build02.jpg)
Title: Re: DNA20
Post by: sterling101 on December 10, 2012, 05:46:31 PM
Watching this with interest Dave - interesting to see if it can handle the 20 watts without too much drop off from the batteries.

I'm up to 30 watts on my mod so far - tempted to go for 40, but I can't see I'll ever need to go that high.... possibly :)
Title: Re: DNA20
Post by: Breaktru on December 10, 2012, 06:16:40 PM
Did I ever send you one of those pistol grip enclosures, can't remember?

The CA8-0:

http://www.serpac.com/ca-series.aspx (http://www.serpac.com/ca-series.aspx)

It'll easily fit an 18650 in it, possibly 2 with your single board DNA.

It's an extremely comfortable enclosure though and having a trigger-type button would absolutely ideal comfort!

http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx (http://www.e-switch.com/ProductCatalog/tabid/88/entity/tabid/95/entityname/category/categoryid/20/sename/Trigger/default.aspx)

No T. It's a bit too weird for my taste  :laughing:
Maybe Alan would whip up something with it.  :laughing2:
Title: Re: DNA20
Post by: CraigHB on December 10, 2012, 06:36:02 PM
I'm up to 30 watts on my mod so far - tempted to go for 40, but I can't see I'll ever need to go that high.... possibly

So far, 30W is the most I've found I can even use at all.  Even then, it's too intense to be practical, it makes too much vapor and consumes juice at an extreme rate.  I've settled in around 17 Watts myself.  You could probably set up a coil that works well as high as 40W, but it's not something you'd actually want to use all the time.
Title: Re: DNA20
Post by: timesarerough on December 11, 2012, 12:09:41 AM
No T. It's a bit too weird for my taste  :laughing:
Maybe Alan would whip up something with it.  :laughing2:

 :laughing2:

Whadamean?

You're the "gun guy".....it's shaped very much like a pistol grip, very comfortable in the hand.
Title: Re: DNA20
Post by: CraigHB on December 11, 2012, 01:12:00 AM
None of the grips on any of my pistols are particularly comfortable.  They're fine for what they're made for, but I wouldn't want to hold one all the time.
Title: Re: DNA20
Post by: Breaktru on December 11, 2012, 07:59:39 AM
Maybe if it was a Pachmayr Grip
Title: Re: DNA20
Post by: Breaktru on December 11, 2012, 10:39:40 AM
Yesterday I set the DNA20 to 20W but never had a load on it or fired it up.

This morning I powered it up with a 7 ohm load but NEVER hit the fire button. It was set previously to 20W and didn’t want to start my testing that high so I scrolled down the wattage and it got stuck at 12.5 watts. Still NEVER hit the fire button. I removed the battery and when I re-connected the battery again, NO display. I measured the output voltage without hitting the fire button and it measures a constant 3.95v w/ a battery voltage of 4.2v.
Title: Re: DNA20
Post by: sterling101 on December 11, 2012, 10:59:56 AM
Sounds like something's gone awry with the controller there - same thing happened on one of my LEA batteries in similar circumstances.  Nothing untoward went on it but it lost the will to live and now it's just a constant battery voltage whether it's powered on, off, fired or not.
Title: Re: DNA20
Post by: Breaktru on December 11, 2012, 02:03:23 PM
Guess what... After posting about the failed DNA20 board, the door bell rang and there was another NEW DNA20 w/ the fix.

Completed testing for 7 watts and 20 watts. Results to follow..........
Title: Re: DNA20
Post by: Breaktru on December 11, 2012, 02:14:31 PM
I coiled a length of 28 gauge Kanthal A1 wire and clipped my output on to various points to achieve the resistance in the test.

Testing at 7 watts:
1.6 ohm - 3.4v
1.7 ohm - 3.5v
2.0 ohm - 3.7v
2.5 ohm - 4.2v
3.1 ohm - 4.6v
3.5 ohm - 4.9v
5.1 ohm - 6.0v
6.4 ohm - 6.7v

Testing at 20 watts:
1.5 ohm - 5.6v
1.9 ohm - 6.3v
2.3 ohm - 6.9v
2.5 ohm - 7.0v
2.7 ohm - 7.3v
3.0 ohm - 7.8v
3.5 ohm - 8.3v - This is the highest resistance that doesn't warn: "Check Atomizer"
3.6 ohm -  "Check Atomizer"

MORE TESTING (http://breaktru.com/smf/index.php/topic,709.msg5789.html#msg5789)
Title: Re: DNA20
Post by: CraigHB on December 11, 2012, 05:13:27 PM
That's an impressive voltage range.  Though, I don't know how useful it is to run a higher resistance atomizer up that high.  Most of the people that would be interested in a unit like this are using rebuildables which tend to run lower resistance.  Though, my understanding is they are targetting this controller to 3rd party manufacturers.  In that case, people buying those devices would tend to use cartomizers and other non-rebuildables in the higher resistance ranges.

The DNA20 would be the only electronics I've seen able to output voltage high enough to run a 3 Ohm atomizer up to 20 Watts.  However, I have yet to see a non-rebuildable that can handle much more than 12 Watts.  You can coil a rebuildable to handle whatever wattage you want, but it's going to be under 2 Ohms for sure.  So, I don't know how much of a valued feature that wide voltage range is going to be.
Title: Re: DNA20
Post by: timesarerough on December 11, 2012, 07:09:02 PM
Something just occurred to me....with the Zmax controller.

If the DNA20 is maxed out at 20W using a 1.5 ohm coil = 5.6V

The Zmax goes waaaay beyond 20W's when using cells in series and through it's VV option!

http://translate.googleusercontent.com/translate_c?act=url&depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&tl=en&twu=1&u=http://www.mountainprophet.de/2012/10/25/und-sie-bewegt-sich-doch-zmax-v2-0-rms-ist-da/&usg=ALkJrhi825n1MT9KGmu_SeR7YesrQ_lhnQ (http://translate.googleusercontent.com/translate_c?act=url&depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&tl=en&twu=1&u=http://www.mountainprophet.de/2012/10/25/und-sie-bewegt-sich-doch-zmax-v2-0-rms-ist-da/&usg=ALkJrhi825n1MT9KGmu_SeR7YesrQ_lhnQ)

I don't know scrap about ohms law and I'm just too lazy to learn, trust the words of those who know, but if that's the case....the Zmax controller is far more powerful!
Title: Re: DNA20
Post by: Breaktru on December 11, 2012, 07:15:43 PM
And my MCU - Nokia Mod, Craig's PowerBlock and Sterlings PWM can go over 30 Watts.  :P
Title: Re: DNA20
Post by: CraigHB on December 11, 2012, 09:03:33 PM
Evolve's retort to that would be, "no one would ever vape over 20W" which may be mostly true, but it's also a matter of efficiency and robustness.  A circuit that can handle 30W is going to be more efficient and reliable even if never taken above 20W.

That's not to take anything away from Evolve's product.  It's an impressive bit of engineering.  Like I said, it's amazing they can get that much power out of such a small module.  And, it's got a full graphic display to boot.


Title: Re: DNA20
Post by: timesarerough on December 11, 2012, 10:11:38 PM
Curious (for those that would know?), how many watts is 4.5V or 4.8V, using a 1.5 ohm STDCC?

All that I know that I can't get the same vape using the VW at 15W on the Z controller.....so I'm guessing that both (4.5 & 4.8V) are over 15W's?

Edit: It's close @15W's though...
Title: Re: DNA20
Post by: Breaktru on December 12, 2012, 10:26:10 AM
Word of CAUTION when handling the Display. Don't be a jerk like I was. I moved the screen when it was clamped to the box w/ a tool. Totally MY fault.
I originally posted that it was extremely fragile. Poor choice of words. Sorry! This has been edited to correct my statement.  :wallbash:

(http://breaktru.com/ecig/dna20damage01.jpg)
(http://breaktru.com/ecig/dna20damage02.jpg)
(http://breaktru.com/ecig/dna20damage03.jpg)
Title: Re: DNA20
Post by: timesarerough on December 12, 2012, 11:11:50 AM
Was that before or after your Co-Op challenge?  :laughing2:

Sorry, had to say it....

Not laughing at you, D...just kinda one of those "I told ya so" moments.   

Bad Omen?

"Don't think so Breakstuff....."  :facepalm:
Title: Re: DNA20
Post by: styl3r on December 12, 2012, 11:22:15 AM
Ummm not a good start was that the new one....
Title: Re: DNA20
Post by: timesarerough on December 12, 2012, 11:41:25 AM
Ummm not a good start was that the new one....

I completely agree!

That's really not good....if it's that fragile and can't be handled.

I mean, it's one thing to have the board lock-up right outa the gate, but something else entirely when the hardware breaks off with normal handling.

Pretty much a GAME ENDER!

Knowing how most modders are gonna be building box mods with these and stuffing multiple components into one....if the screen is really that "cheap" and it breaks just from handling it, the DNA20 is clearly not a good choice for the "DIY" builder.

I think Mamu is correct by stating that she's looking into using a plastic cradle for the OLED, but unless one is readily available.....builders are not gonna want to custom make one.

Evolv might have to re-think their design.

Title: Re: DNA20
Post by: Breaktru on December 12, 2012, 03:25:31 PM
It's totally my fault. First it helps not to have big hands and twisting it around in a tiny box.
The most important thing is.. now this is a stupid one.... after clamping a piece of plastic in behind the display, do not try to align it with it clamped... Like I said.. this is the stupid one.
Title: Re: DNA20
Post by: berger on December 12, 2012, 05:01:53 PM
guess its a good thing the chip got revised or you wouldnt have had the second display :)
ever try out the menu options yet?
Title: Re: DNA20
Post by: Breaktru on December 12, 2012, 05:07:04 PM
ever try out the menu options yet?

* 5 clicks shuts it  off and 5 to turn back on.
* Holding the UP and Fire buttons simultaneously for several seconds and you access the Left Mode. Continue holding the buttons and you access Right Mode. This Flips the Screen 180 degrees.
* Holding the Down and Fire buttons simultaneously for several seconds accesses the Stealth Mode and Normal Mode.
Title: Re: DNA20
Post by: Breaktru on December 12, 2012, 05:08:04 PM
guess its a good thing the chip got revised or you wouldn't have had the second display :)

You said it brother
Title: Re: DNA20
Post by: asdaq on December 12, 2012, 05:15:38 PM
Sorry to hear of your extra challenge and repair, but while you are modding the board itself already tru, how do you think it would stand to have a single mm ground off the width? I see the traces look closer on the BAT side than the CHG, whaddya think? If the width would be 15mm, I could fit it inside a 5/8" tube, although the wiring would be tricky.
Title: Re: DNA20
Post by: Breaktru on December 12, 2012, 05:45:08 PM
Sorry to hear of your extra challenge and repair, but while you are modding the board itself already tru, how do you think it would stand to have a single mm ground off the width? I see the traces look closer on the BAT side than the CHG, whaddya think? If the width would be 15mm, I could fit it inside a 5/8" tube, although the wiring would be tricky.

Not even room to shave off a pubic hair. The traces run to the edges on both sides.
See attached photos (viewable to members only)
Title: Re: DNA20
Post by: Breaktru on December 13, 2012, 09:53:43 AM
Bapgood posted the DNA20 dimensions.
Here is the link to the PDF. There are 6 pages for standard and metric:

DNA20 dimensions PDF (http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CCwQFjAA&url=http%3A%2F%2Fevolvapor.com%2Fwp-content%2Fuploads%2Fdna20.pdf&ei=FGYTUpmbNeGbygGT-YDQBg&usg=AFQjCNE7HCRPgZ65hPuXKAlV9jtgMRkI1A&bvm=bv.50952593,d.aWc)
Title: Re: DNA20
Post by: Breaktru on December 13, 2012, 01:25:58 PM
I still have to mount the FIRE button and shorten the wiring before it is totally complete.
The USB charging jack is under the Up/Down buttons and it uses a 15C Li-Po battery.

(http://breaktru.com/ecig/dna20fire.jpg)(http://breaktru.com/ecig/dna20_compl_01.jpg)
(http://breaktru.com/ecig/dna20_compl_02.jpg)(http://breaktru.com/ecig/dna20_compl_04.jpg)
Title: Re: DNA20
Post by: sterling101 on December 13, 2012, 04:56:45 PM
Now that really shows how tiny that display is!

I think even with 20/20 vision that could be a strain :)
Title: Re: DNA20
Post by: Breaktru on December 13, 2012, 05:25:50 PM
Now that really shows how tiny that display is!

I think even with 20/20 vision that could be a strain :)

It is but the wattage is very easy to read. Even without the Specs on. Uses a larger font.
Title: Re: DNA20
Post by: CraigHB on December 13, 2012, 06:34:04 PM
Probably not readable in direct sunlight, that's the one nice thing about the FSTN LCD I'm using, just as readable in direct sunlight as it is with low ambient light.  That's a consideration for an e-cig since it's something you commonly use outdoors.


Title: Re: DNA20
Post by: Breaktru on December 13, 2012, 07:02:42 PM
Probably not readable in direct sunlight, that's the one nice thing about the FSTN LCD I'm using, just as readable in direct sunlight as it is with low ambient light.  That's a consideration for an e-cig since it's something you commonly use outdoors.

Yeah that Display on your PowerBlock is the best I've seen.
Title: Re: DNA20
Post by: Haileah on December 13, 2012, 07:16:29 PM
Super, that came out awesome. Amazing that there is so much power in that little thing.  :rockin smiley:
Title: Re: DNA20
Post by: CraigHB on December 13, 2012, 08:26:22 PM
Yeah that Display on your PowerBlock is the best I've seen.

Thanks Dave, I like it a lot myself, not the prettiest since it's plain 5x7 dot text, but it's always easy to read.
Title: Re: DNA20
Post by: fsors on December 13, 2012, 11:43:04 PM
Dave amazing work getting all that into a box that small cool stealth mod! :beer-toast:
Title: Re: DNA20
Post by: redwolfe on December 14, 2012, 02:32:30 AM
I still have to mount the FIRE button and shorten the wiring before it is totally complete.
The USB charging jack is under the Up/Down buttons and it uses a 15C Li-Po battery.


Wow I am impressed! Well done on this one Dave. I can't wait to get my hands on a DNA20. I'm getting antsy waiting for them to be released. I've already designed a casing for mine but I am still waiting on my cells from hobby king to show up before I can start building. Also I need to talk to a local friend so he can CNC machine a prototype case for me.
Title: Re: DNA20
Post by: Breaktru on December 15, 2012, 05:09:00 PM
http://www.youtube.com/watch?v=QyIw4i6kxVc (http://www.youtube.com/watch?v=QyIw4i6kxVc)
Title: Re: DNA20
Post by: Pantera on December 15, 2012, 06:00:57 PM
Now that's what I'm talkin about. Fantastic breaktru  ;cheers;
Title: Re: DNA20
Post by: Haileah on December 15, 2012, 06:03:11 PM
Raw power in the palm of your hands  :rockin smiley:
Title: Re: DNA20
Post by: thetruckinggeek on December 15, 2012, 06:04:17 PM
Very :thumbsup: Nice work
Title: Re: DNA20
Post by: wwwest on December 15, 2012, 09:22:28 PM
I don't know how you get that much in a small box like that. You are simply amazing breaktru
Title: Re: DNA20
Post by: Breaktru on December 15, 2012, 10:06:13 PM
Thanks guys
Title: Re: DNA20
Post by: styl3r on December 16, 2012, 07:52:21 AM
Nice one good work as usual, just out of curiosity what is battery run time?
Title: Re: DNA20
Post by: Breaktru on December 16, 2012, 08:06:29 AM
Nice one good work as usual, just out of curiosity what is battery run time?

Thanks styl,
Right now I'm using it for tests. When I get to it, I'll do some run time battery monitoring.
Title: Re: DNA20
Post by: Breaktru on December 16, 2012, 10:42:00 AM
Wow I am impressed! Well done on this one Dave. I can't wait to get my hands on a DNA20. I'm getting antsy waiting for them to be released. I've already designed a casing for mine but I am still waiting on my cells from hobby king to show up before I can start building. Also I need to talk to a local friend so he can CNC machine a prototype case for me.

Thanks redwolfe.
Can't wait to see your mod when your done. Don't forget to come back and post it on this forum.
Title: Re: DNA20
Post by: Breaktru on December 16, 2012, 11:01:53 AM
The DNA20 has Mode Selections as follows:

* 5 clicks of the Fire button enters Locked Mode and 5 clicks to unlock.
With the module in Locked Mode:
* Holding the UP and Fire buttons simultaneously for several seconds and you access the Left Mode. Continue holding the buttons and you access Right Mode. This Flips the Screen 180 degrees.
* Holding the Down and Fire buttons simultaneously for several seconds accesses the Stealth Mode and Normal Mode. Stealth mode allows you to vape without the screen illuminated.

When idle, the board goes into Power saver mode after a few seconds where the screen dims to half bright and then a few seconds more extinguishes.
Title: Re: DNA20
Post by: SmokeRings on December 16, 2012, 11:49:20 AM
 ;hubba; this would be my ultimate mod  :beer-toast:
Title: Re: DNA20
Post by: fsors on December 16, 2012, 11:06:35 PM
;hubba; this would be my ultimate mod  :beer-toast:

yeah me 2 soon as they send me free boards :laughing2:
Title: Re: DNA20
Post by: redwolfe on December 16, 2012, 11:25:00 PM
Thanks redwolfe.
Can't wait to see your mod when your done. Don't forget to come back and post it on this forum.

There's no way I'm going to forget to do that.  :) I talked to my buddy and he suggested I do the prototype case out of delrin and if I like how it turns out I can go to aluminum at a later time. I thought it was a great idea. I need to come up with a name for it still.
Title: Re: DNA20
Post by: Breaktru on December 17, 2012, 07:20:18 PM
Latest Test Results:

I coiled a length of 28 gauge Kanthal A1 wire and clipped my output on to various points to achieve the resistance in the test. A Panasonic High Drain CGR18650, 10C 10A battery was used.

Testing at 7 watts:
1.2 ohm – 3.5v – 2.91a
1.4 ohm – 3.6v – 2.6a
1.5 ohm – 3.3v – 2.44a
1.8 ohm – 3.6v – 2.00a
2.0 ohm – 3.8v – 1.86a
2.3 ohm – 4.1v – 1.74a
2.5 ohm – 4.2v – 1.68a
3.0 ohm – 4.7v – 1.52a
3.2 ohm – 4.8v – 1.47a
3.5 ohm – 5.0v – 1.41a
3.7 ohm – 5.1v – 1.37a
4.0 ohm – 5.3v – 1.31a
5.0 ohm – 6.0v – 1.18a
6.0 ohm – 6.5v – 1.08a

Testing at 20 watts:
1.2 ohm – 4.9v – 4.13a
1.5 ohm – 5.6v – 3.62a
1.8 ohm – 6.1v – 3.31a
2.0 ohm – 6.4v – 3.16a
2.3 ohm – 6.9v – 2.92a
2.5 ohm – 7.2v – 2.77a
2.8 ohm – 7.5v – 2.64a
3.0 ohm – 7.8v – 2.56a
3.3 ohm – 8.1v – 2.46a (Check Atomizer Warning)
3.5 ohm – 8.2v – 2.36a (Check Atomizer Warning)
3.7 ohm – 8.3v – 2.30a (Check Atomizer Warning)
4.0 ohm – 8.3v – 2.05a (Check Atomizer Warning)
4.2 ohm – 8.3v – 1.99a (Check Atomizer Warning)
4.5 ohm – 8.3v – 1.87a (Check Atomizer Warning)
4.8 ohm – 8.3v – 1.75a (Check Atomizer Warning)
5.0 ohm – 8.3v – 1.65a (Check Atomizer Warning)
5.5 ohm – 8.3v – 1.56a (Check Atomizer Warning)
6.0 ohm – 8.3v – 1.39a (Check Atomizer Warning)

If you compare some of the readings to ohms law, you will see a difference in results.
Title: Re: DNA20
Post by: CraigHB on December 17, 2012, 09:46:26 PM
The CRG18650CH is actually a 5C cell, I think you meant to say 10A not 10C.   I think it has around 50m Ohms internal impedance, lower than the NCR18650A which is around 80m Ohms, but higher than a 10C or 20C LiPo.  Not to take anything away from the CGR18650CH, it's a good high drain cell, probably the best round cell available all things considered.

Calibration may be an issue for the DNA20, there's probably going to be an amount of acceptable deviation as far as quality control goes.  I doubt they calibrate them on a one by one basis.  I calibrate each build in code for my own mods to get error under 1% across the full voltage and load range.  It's a pain in the ass, not something practical for mass production.   On the other hand, using parts with tight enough tolerances to avoid that becomes cost prohibitive.
Title: Re: DNA20
Post by: Breaktru on December 17, 2012, 10:05:48 PM
Whoops sorry about the slip. Thanks for the correction Craig. I'll have to edit the battery rating.

Yeah, some tweaking needs to be done on the calculations. I had already sent my findings to Brandon and they were going to look into it. That's the beauty of beta testing.
Title: Re: DNA20
Post by: Brian9523 on December 18, 2012, 05:17:24 PM
You're a lucky dog breaktru. Wish that I got a freebie like that. You did a terrific job with  :applaude:
Title: Re: DNA20
Post by: Breaktru on December 21, 2012, 03:01:49 PM
Shop Now
DNA 20D

Individual quantities of the DNA 20D regulator module are shipping directly now

BUY NOW (http://evolvapor.com/our-products/#DNA20)
Title: Re: DNA20
Post by: redwolfe on December 21, 2012, 03:25:52 PM
I got mine ordered and on the way! Cant wait!
Title: Re: DNA20
Post by: Breaktru on December 21, 2012, 03:29:43 PM
I got mine ordered and on the way! Cant wait!

You are one of the lucky ones, they are already SOLD OUT
Title: Re: DNA20
Post by: thetruckinggeek on December 21, 2012, 03:57:37 PM
How much were thay? :help:
Title: Re: DNA20
Post by: redwolfe on December 21, 2012, 04:29:00 PM
I paid 51.49 shipped for 1 single board
Title: Re: DNA20
Post by: timesarerough on December 22, 2012, 01:13:23 AM
Hey D...what's this that I'm reading elsewhere that Evolv is recommending that the DNA be used with a 17C battery??

Uuuum, what!!?

Guess that rules out any cylindrical cells....

Li-Po or nothing?

BTW, there's a much better mini USB charger to be had here:

http://www.ebay.com/itm/Mini-USB-Lithium-Battery-Charging-Board-Charger-Module-5V-1A-/121041531442?pt=Battery_Chargers&hash=item1c2ea33232 (http://www.ebay.com/itm/Mini-USB-Lithium-Battery-Charging-Board-Charger-Module-5V-1A-/121041531442?pt=Battery_Chargers&hash=item1c2ea33232)

It's 1A adjustable charging output and has 2 color-changing micro LED's right on the board.

These sell for about a $1.....

Evolv's price of $7.50 for a 500ma non-adjustable charging board with NO LED's is just plain ole ROBBERY!
Title: Re: DNA20
Post by: Breaktru on December 22, 2012, 10:18:46 AM
According to the Datasheet, SEE ATTACHED file below...
Battery:
A single cell rechargeable lithium chemistry battery is recommended. Either a lithium ion or a lithium polymer type can be used. Any battery used should be rated for a MINIMUM of 7 amps continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly preferred.
A 7amp battery is rated 14C My mistake, sorry disregard.
1 x 1400mah or 1.400Ah = 1.400 x 5C = 7 amps
or
1 x 700mah or 0.700Ah = 0.700 x 10C = 7 amps

I've use that charge board that you linked to in the ZMax v2 box. If you have the space then fine but it is 2 1/2 times the size of the DNA board. Yes it's expensive. If you would like to make your own, you can build one on this tiny break-out board that Madvapes sells.

SEE datasheet below this line
Title: Re: DNA20
Post by: CraigHB on December 22, 2012, 03:15:03 PM
BTW, there's a much better mini USB charger to be had here:

That's a linear charger so it's for sure going to need heat sinking to run at a rate much above 500mA.  I don't see any on that board.  The chip may hit thermal limiting and charge at a lower rate even if set for 1A.  I don't know if it can actually put out a 1A rate or not, but you pay your nickel and take you chances with electronics purchased from China via eBay.

A 7amp battery is rated 14C

Not sure what you mean by that.  To calculate battery drain requirements, you look at maximum output plus losses than divide out worst case battery voltage.

For example, if maximum output is 20W and assuming 80% efficiency, that would be maximum input power of 25W.  Using a worst case battery voltage of 3V yields 25W/3V or a little over 8 Amps.  Therefore, you would want a battery capable of at least 8 Amps drain.  In electronics you always allow margins for tolerance so if it were me, I would use a battery with at least a 10 Amp drain limit.
Title: Re: DNA20
Post by: Breaktru on December 22, 2012, 03:53:28 PM
That's a linear charger so it's for sure going to need heat sinking to run at a rate much above 500mA.  I don't see any on that board.  The chip may hit thermal limiting and charge at a lower rate even if set for 1A.  I don't know if it can actually put out a 1A rate or not, but you pay your nickel and take you chances with electronics purchased from China via eBay.

Not sure what you mean by that.  To calculate battery drain requirements, you look at maximum output plus losses than divide out worst case battery voltage.

For example, if maximum output is 20W and assuming 80% efficiency, that would be maximum input power of 25W.  Using a worst case battery voltage of 3V yields 25W/3V or a little over 8 Amps.  Therefore, you would want a battery capable of at least 8 Amps drain.  In electronics you always allow margins for tolerance so if it were me, I would use a battery with at least a 10 Amp drain limit.

We talked about that same charger before at: Charger Talk for 1A (http://breaktru.com/smf/index.php/topic,588.msg3871.html#msg3871)
The vendor posted a chart to increase to incremented amperage up to 1A but since removed the 1A in the chart by changing the RPROG resistor.
If you scroll down the page you will see the chart at: 1AMP Charger (http://www.ebay.com/itm/5V-Mini-USB-1A-Lithium-Battery-Charging-Board-Charger-Ultra-Small-Module-/261048190436?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D11%26meid%3D4342896615519613542%26pid%3D100011%26prg%3D1005%26rk%3D4%26sd%3D280875366103%26)


I had read a general statement once that if you double the Amperage Discharge rate of the battery, you will come up with the C rating.

BTW: Looks like they reworked the the DNA20 to a Minimum output of 4.0V. The datasheet says the that it is 95% efficient and it can output 6A max which the highest I hit was a little over 4amps.
I know that boost circuits would require a battery w/ higher amperage than the boost can output.
Title: Re: DNA20
Post by: timesarerough on December 22, 2012, 04:07:39 PM
...but you pay your nickel and take you chances with electronics purchased from China via eBay.

Good enough for Dave's mods, it's good enough for me!

But who's to say that the DNA charger (and the DNA20 for that matter) wasn't made in China?

I've yet to see ANY proof that Dimension Engineering actually builds their own boards here....especially when they only employ 5 people?

Doesn't sound like a factory to me man....
Title: Re: DNA20
Post by: CraigHB on December 22, 2012, 07:58:23 PM
You can check the rate of your charger pretty easily.  If you put an ammeter inline with the USB power source, what's measured is really close to the actual charging rate since there's not much overhead.  One caveat with that is you should check when the battery is heavily discharged.  That's when thermal dissipation required for the controller is highest.

I wasn't trying to imply 80% efficiency for the DNA20 with that example.  It was just a number I pulled out of a hat to use in an example.  The 95% number they're claiming is average.  It would be higher at lower outputs and lower at higher outputs.  For example, the booster I use averages 95% but will drop down to 92% under heavy load.  It's 98% when input and output voltage are the same.  My booster is designed for a comfortable margin running 5A output at 6V so I would imagine efficiency on theirs falls off more as outputs approach maximum.

You can check efficiency easily on the bench.  Measure input current and voltage.  The product is input power.  Measure output voltage and current to get output power.  Efficiency is output power divided by input power x100 to put it into percent.

I'd only believe 6A output if I measured it myself.  4A output is pretty lofty for such a small PCB.  At 6A output, the circuit traces alone would overheat if there's much voltage boosting involved.  Also, no doubt they're using a converter controller with built-in MOSFETs, no way it could sink the heat.


Title: Re: DNA20
Post by: redwolfe on December 24, 2012, 11:22:54 AM
My DNA20 showed up today! I'm amazed how TINY it is. Now to get it into something so I can use it.
Title: Re: DNA20
Post by: Breaktru on December 24, 2012, 01:02:32 PM
My DNA20 showed up today! I'm amazed how TINY it is. Now to get it into something so I can use it.

Yup, it's tiny. Now get to work.  :laughing2:
Title: Re: DNA20
Post by: Aromaz on January 01, 2013, 03:50:50 PM
Cool breaktru  :rockin smiley: very nice
Title: Re: DNA20
Post by: cisco9904 on January 06, 2013, 03:45:32 PM
This cisco9904 thank you for your email,I do thank very much.I fell in love with the DNA20 after looking at your work looks get,Happy Vaping
Title: Re: DNA20
Post by: synchro on January 12, 2013, 02:12:51 PM
Threw one together this morning, took about 2 hours to get everything wired and installed.  Used 2 1000mah lipo's in parallel and the evolv micro usb charger.  Pretty nice, seems like the PWM on this one is 'softer' than the Darwin or DNA12 but still hits nice.  With a 2 ohm coil in the Zen it maxed out at about 18.5 watts, more than I will use.  Around 12.5 is where I like it for most things.

(Pardon the case, it was recycled from another mod and was in rough shape to start with  8))

I wish the cable to the display was longer, its pretty short and flimsy.  Adding some more length and maybe going to something less flimsy would provide more options and be easier to work with.

Its kinda funny when it first resumes from sleep too, takes a bit to get its bearings and get all the measurements down. 
Title: Re: DNA20
Post by: Breaktru on January 12, 2013, 03:08:53 PM
Nice, 2 Li-Po's  :rockin smiley: Thanks for sharing it with us.

Yeah, you have to be careful w/ the ribbon cable and not much length to play around with.
Title: Re: DNA20
Post by: kortt on January 12, 2013, 11:39:01 PM
Nice work everyone!  I'm going to have to save my pennies and get one!  :rockin smiley:
Title: Re: DNA20
Post by: tintin on January 14, 2013, 01:39:31 PM
The display broken a little in my dna20.
Its extremely fragile.
Where can i buy a new one the same as original to replace ?
Title: Re: DNA20
Post by: wwwest on January 14, 2013, 01:51:59 PM
The display broken a little in my dna20.
Its extremely fragile.
Where can i buy a new one the same as original to replace ?

Ah-Oh, sorry to hear that. Sounds like you have the same trouble Dave had in post: Broken Display (http://breaktru.com/smf/index.php/topic,709.msg5744.html#msg5744)
Title: Re: DNA20
Post by: Breaktru on January 14, 2013, 02:24:40 PM
The display broken a little in my dna20.
Its extremely fragile.
Where can i buy a new one the same as original to replace ?

I would first contact Evolv and see what they can do for you.
Displays need controllers and software drivers for the particular model screen. You can't just throw on any oLed screen.

See this post for the exact replacement: 0.69 inch 96x16 OLED (http://breaktru.com/smf/index.php/topic,1379.msg17339.html#msg17339)
Title: Re: DNA20
Post by: kortt on January 14, 2013, 02:37:41 PM
Is it the ribbon that is breaking?  I wonder if there some way to re-enforce the ribbon right out of the box?
Title: Re: DNA20
Post by: redwolfe on January 14, 2013, 03:04:37 PM
Personally, since some of the screens have been breaking on people, in my opnion I think it should have been directly mounted on the PCB instead of hanging off on a ribbon. The ribbon seems to be the weakest link of the product.
Title: Re: DNA20
Post by: zeus17 on August 05, 2013, 11:23:17 AM
nice work as always sir breaktru..
now just need to save me some dollars for it...
watching thread closely...

i just wish this one and an innokin mvp was available locally...
Title: Re: DNA20
Post by: digiw0rx on August 07, 2013, 02:40:38 PM
This is a bit of an old thread zeus, i don't know how much more it'll get updated!
Title: Re: DNA20
Post by: zeus17 on August 07, 2013, 02:55:12 PM
This is a bit of an old thread zeus, i don't know how much more it'll get updated!

don't worry I am kinda ok with it..
nothing much has changed on the actual vaping kits...except for the rba/rda but most pv's right now are just mostly mech...
little love is given to vv nowadays...old or new...I still like it...
like the old evercool mod..planning to build one,just waiting for the chips from TI...box mod...but I plan to use a fliptop box of Marlboro or those tin cans by lucky strike as a case....
Title: Re: DNA20
Post by: CraigHB on August 07, 2013, 06:33:32 PM
That's true, all the love seems to be going toward mechanical mods with very low resistance coils.  I still like my VV boxes though.  Have no intention of going the unregulated route.  I have zero tolerance for battery fade.
Title: Re: DNA20
Post by: Breaktru on August 07, 2013, 07:58:16 PM
Update:
DNA20D mod still going strong. Still using the first Beta model although I have a couple of more recent releases of the board, I have yet to build another.

I know there are old threads on this forum but I believe they are still helpful to members looking for info. So don't hesitate to post if the threads haven't been updated in awhile. All posts are welcome  :thumbsup:
Title: Re: DNA20
Post by: zeus17 on August 08, 2013, 09:03:47 AM
That's true, all the love seems to be going toward mechanical mods with very low resistance coils.  I still like my VV boxes though.  Have no intention of going the unregulated route.  I have zero tolerance for battery fade.

yup specially here in my country everyone is crazy doing sub ohm coils and like 3 coils of 3/4 wraps...plus I really don't understand why the mods are getting really expensive specially the mech ones,..
rba/rda I might understand,,,then again I don't,hehehhe specially the crazy rda that are produced in my country...

for me...I stil like vv,since well still kind looks different,,,
been wanting to get this chip,sadly its still out of stock and don't know if they ship to the Philippines,.
Title: Re: DNA20
Post by: CraigHB on August 08, 2013, 03:46:11 PM
I understand why they're ~more~ expensive since the production numbers are low and there's a lot of machine work involved, but if they're charging really high prices, that's just taking advantage of the high demand for them.

People are doing crazy stuff like running dual coils for resistances of like a third of an Ohm.  I've played with the sub-ohm coils and I actually get better performance with my VV using the same setup with an extra turn or two for a higher resistance which allows a higher voltage. 

With a good ultra low impedance battery (like the Sony US18650VTC3) in a mechanical running a sub-ohm coil, you get into into power levels upwards of 20 Watts and even into the 30's with the dual coils.  Having a VV mod capable of 36 Watts output, I can say there's a limit to how much power a person can comfortably vape with.  It ~is~ possible to get too much vapor. 

With those extreme power levels I suppose it would be okay if you vape very sparingly, but the human lungs can only tolerate so much vapor and if I use power levels like that regularly, it makes my throat and lungs sore.  Though I can build a coil(s) that can run those power levels no problem, the flavor is fine and there's no burnt taste.
Title: Re: DNA20
Post by: zeus17 on August 08, 2013, 05:19:22 PM
I understand why they're ~more~ expensive since the production numbers are low and there's a lot of machine work involved, but if they're charging really high prices, that's just taking advantage of the high demand for them.

People are doing crazy stuff like running dual coils for resistances of like a third of an Ohm.  I've played with the sub-ohm coils and I actually get better performance with my VV using the same setup with an extra turn or two for a higher resistance which allows a higher voltage. 

With a good ultra low impedance battery (like the Sony US18650VTC3) in a mechanical running a sub-ohm coil, you get into into power levels upwards of 20 Watts and even into the 30's with the dual coils.  Having a VV mod capable of 36 Watts output, I can say there's a limit to how much power a person can comfortably vape with.  It ~is~ possible to get too much vapor. 

With those extreme power levels I suppose it would be okay if you vape very sparingly, but the human lungs can only tolerate so much vapor and if I use power levels like that regularly, it makes my throat and lungs sore.  Though I can build a coil(s) that can run those power levels no problem, the flavor is fine and there's no burnt taste.


yup mech mods here converted to USD is roughly $100 and I think some of them are actually sold in the US also with RBA like the era atty.
believe me they are overpriced...I know some of them makers and production here a heck of a lot cheaper..
Here VV mods are almost obsolete and the ones that are available are either crappy or expensive.
vv mods that are available here are just provari and lavatube, I saw someone selling vamo's but like $70ish...
nothing like the mvp...it have to ship it here..and a bit afraid that customs will hold it..not because its a pv...but because customs here a just corrupt..

well in terms of vaping experience,,
I do like my vv it an old evercool mod that has survived now for like almost 2 years more or less..thanks to breaktru for that mod.it still housed on my crappy Marlboro fliptop box.

and I do agree with you..vaping @ 5v on a 2.3 ohm coil is just like any sub ohm out there..less the risk of batts blowing up..
sad reality is efest is the most affordable decent battery that most of us here can get,and crazy people here build sub ohms dual coils on those..

so that I don't get off topic is there another source of this chip?
Title: Re: DNA20
Post by: CraigHB on August 09, 2013, 12:59:02 AM
A person does have to be aware of what they're doing when pulling that much current out of a battery.  There's going to be considerable voltage drop from the mod's resistance plus the internal resistance of the battery, but a coil a third of an Ohm can pull upwards of 10 Amps.  If not using the right battery, there could be problems. 

I would expect Evolve to ramp up production of the DNA20 since they seem to sell pretty well.  Probably just a matter of waiting until resellers have stock.  Vaping being so popular in the Philippines, I would surprised if a local seller does not get some eventually.

I don't think regulated mods will ever become extinct since there's plenty of people that have a strong dislike for the battery fade you get with a mechanical.  I'm one of them.
Title: Re: DNA20
Post by: poorboy on August 11, 2013, 01:30:49 AM
It's been a while since i last posted here. Hey, craig and dave! :D got same problem. Broke the oled. Now, I'm Trying to find a replacement here locally. Another prob is i dont have the exact part# :( anyone?
Title: Re: DNA20
Post by: Breaktru on August 11, 2013, 08:14:21 AM
It's been a while since i last posted here. Hey, craig and dave! :D got same problem. Broke the oled. Now, I'm Trying to find a replacement here locally. Another prob is i dont have the exact part# :( anyone?

Welcome back poorboy. The first thing I would do is contact Evolve for a replacement. So far I haven't heard of a single person who was denied a replacement.
Title: Re: DNA20
Post by: zeus17 on August 12, 2013, 08:59:47 AM
It's been a while since i last posted here. Hey, craig and dave! :D got same problem. Broke the oled. Now, I'm Trying to find a replacement here locally. Another prob is i dont have the exact part# :( anyone?


hi,saw your location/....where did you buy yours???
Title: Re: DNA20
Post by: Blakd on August 18, 2013, 06:55:16 PM
What is the part number for those little black buttons?
Title: Re: DNA20
Post by: breakstuff on August 19, 2013, 07:28:44 AM
What is the part number for those little black buttons?

They look like a standard tactile switch. You can get them at any electronic parts distributor.
The button tops come in different heights.
Title: Re: DNA20
Post by: Breaktru on August 19, 2013, 08:21:51 AM
What is the part number for those little black buttons?
They look like a standard tactile switch. You can get them at any electronic parts distributor.
The button tops come in different heights.

Yes they are standard 50ma, 6 x 6 mm size tacts (Off - Mom). They come in a variety of actuator lengths and actuation force.
The actuator length depends on the thickness of your box and how long you want it to protrude.
Title: Re: DNA20
Post by: poorboy on August 23, 2013, 06:45:01 AM

hi,saw your location/....where did you buy yours???

A local online vape shop here in ph vapetime.net. :)

Welcome back poorboy. The first thing I would do is contact Evolve for a replacement. So far I haven't heard of a single person who was denied a replacement.

Thanks dave! It didn't came from evolve directly just got from a local vapeshop here in PH, and I'm not sure if they will replace it like evolve does. Is this the one? http://www.newark.com/densitron/dd-9616be-3a/display-oled-blu-96x16/dp/83R9566 (http://www.newark.com/densitron/dd-9616be-3a/display-oled-blu-96x16/dp/83R9566) like the one you used.
Title: Re: DNA20
Post by: Breaktru on August 23, 2013, 07:49:50 AM
Thanks dave! It didn't came from evolve directly just got from a local vapeshop here in PH, and I'm not sure if they will replace it like evolve does. Is this the one? http://www.newark.com/densitron/dd-9616be-3a/display-oled-blu-96x16/dp/83R9566 (http://www.newark.com/densitron/dd-9616be-3a/display-oled-blu-96x16/dp/83R9566) like the one you used.

The DNA20 has a 1yr warranty. I'm sure your local vapeshop has a return policy with Evolv. I would ask them.

Unless the oLed is the same, it may not work. See --> THIS (http://breaktru.com/smf/index.php/topic,709.msg6029.html#msg6029)
I used an oLed from a bad DNA20 board. So it was an exact replacement screen.
Title: Re: DNA20
Post by: zeus17 on August 23, 2013, 01:38:50 PM
where in ph and what shop did you get your dna?
been looking for ages online,never found one...
Title: Re: DNA20
Post by: poorboy on August 23, 2013, 05:31:38 PM
I see. I'll ask them. Thanks again dave.

Zeus, I got it from www.vapetime.net
Title: Re: DNA20
Post by: Mandro on August 24, 2013, 06:22:10 AM
It's good to know that the DNA20 has a 1yr warranty, I've had mine for a couple of months now and still haven't got the confidence to use it.
I'll try a few more regular VV mods to build up my soldering skills.
Title: Re: DNA20
Post by: zeus17 on August 27, 2013, 02:39:39 PM
I see. I'll ask them. Thanks again dave.

Zeus, I got it from www.vapetime.net

thanks did'nt know vapetime are selling mods now and not just juices...
Title: Re: DNA20
Post by: dausnasir on October 18, 2013, 05:06:30 AM
Hello guys,

Im from Malaysia. Plan to build one small mods of DNA20. Somewhere i have notice that the DNA20 recomendded to use a 7A battery which is a 700mah battery if i am not mistaken.

I try to build a really small mod on my hand(asian hand thou-their really small huh?). I plan to use a 14500 batteries with 750mah/700mah. But how long it will last since its only a small capacity...im afraid that using 14500 700mah would not last for an hour?  :Thinking:
Title: Re: DNA20
Post by: Breaktru on October 18, 2013, 09:38:03 AM
Hello guys,

Im from Malaysia. Plan to build one small mods of DNA20. Somewhere i have notice that the DNA20 recomendded to use a 7A battery which is a 700mah battery if i am not mistaken.

I try to build a really small mod on my hand(asian hand thou-their really small huh?). I plan to use a 14500 batteries with 750mah/700mah. But how long it will last since its only a small capacity...im afraid that using 14500 700mah would not last for an hour?  :Thinking:

Welcome to the forum.
An AW IMR 600mah is 8C
8C = 1 x 600mah or 0.600Ah __ 0.600 x 8C = 4.8 amps
The AW IMR is capable of a 4.8 amp discharge rate

If you would like to keep the mod small, try the Nano-Tech 1200mah 15C Li-Po battery shown in reply #19.
15C = 1 x 1200mah or 1.2Ah __ 1.2 x 15C = 18 amps
Title: Re: DNA20
Post by: CraigHB on October 18, 2013, 01:18:13 PM
Somewhere i have notice that the DNA20 recomendded to use a 7A battery which is a 700mah battery if i am not mistaken.

You are actually, 7A is 7000mA which is drain limit.  Ah or mAh stands for amp-hours or miliamp-hours which is charge capacity.  You're talking about two different battery specifications.  One is drain limit and the other is charge capacity.  The DNA20 requires a battery with a 7A or 7000mA drain limit. 

One thing to note about drain limit ratings is they are for continuous drain and we don't power an atomizer continuously.  The burst drain limits that apply to powering an atomizer are somewhat higher.  In terms of safety you can go over a bit, but there are other limitations.

Battery selection is also a matter of the battery's ability to supply power.  Smaller batteries with less charge capacity typcially have lower drain limits.  A smaller battery sags in voltage under load more heavily which can cause problems for boosters.  They also have higher internal impedance which can also cause problems for boosters.  The higher the drain limit, the better the battery will deliver power under heavy load.
Title: Re: DNA20
Post by: dausnasir on October 22, 2013, 05:28:10 AM
Thank you for a very good explanation on this Breakhru and CraigHB..this helps me a lot...

i decide to take the turnigy 1200mah 15c as mention....thanks again and really appreciated...

here is my prototype without the DNA20 with a single 14500

(http://farm6.staticflickr.com/5506/10418859744_6423e5f2a0.jpg) (http://www.flickr.com/photos/66695017@N07/10418859744/)
munchis (http://www.flickr.com/photos/66695017@N07/10418859744/) by Da'madness (http://www.flickr.com/people/66695017@N07/), on Flickr
Title: Re: DNA20
Post by: Breaktru on October 22, 2013, 06:46:32 AM
Thank you for a very good explanation on this Breakhru and CraigHB..this helps me a lot...

i decide to take the turnigy 1200mah 15c as mention....thanks again and really appreciated...

here is my prototype without the DNA20 with a single 14500

You are welcome. Nice mod. That's a cool box. Thanks for sharing
Title: Re: DNA20
Post by: Visus on November 08, 2013, 09:11:44 AM
The DNA20 is so yesterday now that there are rumors of a DNA30 ;hubba;   :laughing: :thumbsup: lol

nice mods glad I got to look in the rear view and see the beta version worked out to what people vape on and rave about til-now..
Title: Re: DNA20
Post by: CraigHB on November 08, 2013, 05:10:06 PM
If they can do a 30 Watt booster with a PCB that small, I'll be quite impressed with the engineering prowess on Evolv's part.  I get 36 Watts out of my booster, but my PCB is 3 times the size and it's already as small as I can possibly make it.  Boosters need bigger PCBs than step down converters because they have to do more work.  More work means bigger components which means a bigger PCB.  It's easier to go downhill with a step down converter than uphill with a boost converter.


 
Title: Re: DNA20
Post by: Visus on November 08, 2013, 09:05:02 PM
I was thinking maybe they are using the dna to power an okr,  he says it needs external components and I immediately thought that.
Just joshin' in my own brain with lil knowledge about it all..  Like breaks okr mod --wonder if this isnt breaks mod lol woot

Quote from: vaporjoes.blogspot
What is the "DNA30"?

I'm calling it the DNA30 because he confirmed the specs. I was never given an actual name of the board.  The new board is sitting in a new module that will work in conjunction with a certain mod "system". I'm being vague for a reason. I promised I wouldn't reveal what mod maker-- for now. The board looks VERY similar to the DNA20. At first glance you might think it is the DNA20, and many did, because it was shown off at VaperCon under everyone's nose.

It was slated to be released on December 27th. I asked him to confirm it, and he only said, "there will be nothing before Christmas." Sounds about right?
Title: Re: DNA20
Post by: Breaktru on November 08, 2013, 10:12:58 PM
I beta tested the first DNA12 and the DNA20 before it was released for sale. If this in fact is true about a DNA30, hopefully I will receive it before release.
Title: Re: DNA20
Post by: CraigHB on November 09, 2013, 11:50:23 AM
I was thinking maybe they are using the dna to power an okr,  he says it needs external components and I immediately thought that.  Just joshin' in my own brain with lil knowledge about it all..  Like breaks okr mod --wonder if this isnt breaks mod lol woot

Going with with a step down that requires series cells would be a whole different design making it something that has little in common with a DNA20.  It lowers the voltage cap limiting the range of resistance that allows a full wattage range.  Also, it doesn't allow the use of USB charging since higher voltage is required to charge series cells.  Based on their previous products, it doesn't sound like something Evlov would go for.

If they do a 30W module, the only possibility I see would be a more powerful version of the same DNA20 design.  Certainly do-able if they increased the PCB size a bit, but that becomes a length issue for an 18650 tube.  That's what the DNA20 is designed for, though plenty of people make box mods with them.
Title: Re: DNA20
Post by: CraigHB on November 09, 2013, 03:05:29 PM
I just saw in another forum where a guy mentioned he saw a mod with a "prototype" DNA30 at Vapercon.  So, it looks like they are in fact going to be making one.  I'll be really interested to see if they are able to fit it on the same size PCB as the DNA20.
Title: Re: DNA20
Post by: Breaktru on November 09, 2013, 03:43:00 PM
I found this: THE DNA30: MY TALK WITH BRANDON FROM EVOLV @ VAPERCON (http://vaporjoe.blogspot.com/2013/11/the-dna30-my-talk-with-brandon-from.html)
Title: Re: DNA20
Post by: Visus on November 09, 2013, 07:28:24 PM
Quote from: Craighb
Certainly do-able if they increased the PCB size a bit, but that becomes a length issue for an 18650 tube.  That's what the DNA20 is designed for, though plenty of people make box mods with them.

When the DNA20 first came out the chip designer Brandon made a mod tube in about 5 minutes on cam out of a transparent tube, I was blown away.  He even made buttons for it out of roofing nails.  5 minutes lol,  he cheated a bit, it had a 510 with wires on it  and holes drilled..  Yeah it was a good advertisement, the dna20 is really cool.  Excited to see the 30' .

Two USA mods using one battery delivering great vapes on 3.7v -- I look at China and wonder if its respect that they dont copy-paste or its really so proprietary and codexed that they cannot crack the software..

Watched a video on your mod Craig --Lordy in UK, he has everything but says your mod blew them all out the water.  The ecig biz is still young-un hopefully for ya Craig to have light shine as your also delivers on 3.7v and form is sweet..  I read that you have to optimize each and every one you build, so I understand why its so badarse and not made for a factory production but close is good too..   :thumbsup:
Title: Re: DNA20
Post by: CraigHB on November 10, 2013, 12:43:18 PM
I read that you have to optimize each and every one you build, so I understand why its so badarse and not made for a factory production but close is good too.

Yeah, the calibration thing is an issue.  There's no way around it and it's not something I could just blow off since tolerances are way too wide to rely on component values for accuracy.

I do the calibration in software, but by modifying the source code.  I need to add a code block that allows me to put the unit in a calibration mode providing an interface to save offsets and scalers in flash memory.

It's actually a lot of code to add a calibration interface and I don't have enough program memory with my current stock of MCUs.  I screwed up by stocking up on 16KB controllers when I should have stocked up on 32KB controllers.  Really kicking myself over that.  They're not particularly cheap so I want to use up the 16KB ones I have.  At some point I need to switch controllers and add that interface.

The calibration issue is just one of several I have in producing these on any kind of scale.  I still make more than I need, but the numbers are very small.


Title: Re: DNA20
Post by: studiovape on November 14, 2013, 07:21:49 AM
Hey guys, been lurking for a while, wanted to show you my build :
I finally got time time to use one of my DNA20 chips in a new Sick Mod bottom feeder, this time using Queen Ebony, I was quite pleased to keep it as compact as it came out.

(http://farm4.staticflickr.com/3826/10839407396_803c3caf20_k.jpg)

(http://farm8.staticflickr.com/7329/10839345145_0eca5eb549_k.jpg)

(http://farm4.staticflickr.com/3736/10839679173_b970ba34c1_k.jpg)
Title: Re: DNA20
Post by: studiovape on November 14, 2013, 07:23:03 AM
More pictures and more sweat :)

(http://farm6.staticflickr.com/5544/10839676763_fa47de6bcd_k.jpg)

(http://farm8.staticflickr.com/7355/10839437726_c581962d2c_k.jpg)

(http://farm8.staticflickr.com/7379/10839624525_b320d8d5fb_z.jpg)
Title: Re: DNA20
Post by: studiovape on November 14, 2013, 07:25:15 AM
Exciting news about the DNA30, cool that we will be able to get some info ahead of time, must be so hard having to do all this beta testing.
Title: Re: DNA20
Post by: Breaktru on November 14, 2013, 09:16:36 AM
Very nice Studio. That is fine wood workmanship  :applaude:
Thanks for sharing the whole build process with us  :rockin smiley:
Title: Re: DNA20
Post by: CraigHB on November 15, 2013, 03:37:38 AM
That's a beauty, enjoyed seeing it.  You don't see many regulated wet boxes, most boxes are regulated or wet, not both.
Title: Re: DNA20
Post by: studiovape on November 15, 2013, 06:00:35 AM
Thanks guys, I still have to pull the module out to do the final water/moisture sealing, but as I'm using the onboard buttons I'm still scratching my head as how to encase it in silicon or hot glue and not affect button action, high temp silicon in a tube isn't somthing I've seen locally, but may well be the final choice.
Title: Re: DNA20
Post by: simon28 on November 17, 2013, 09:44:01 PM
Hi everyone! Another guy here from the Phil wanting to venture out into regulated mods. Mechs are ok but I know regulated mods are better.

Hope all is well. Cheers!
Title: Re: DNA20
Post by: Breaktru on November 18, 2013, 07:25:08 AM
Hi everyone! Another guy here from the Phil wanting to venture out into regulated mods. Mechs are ok but I know regulated mods are better.

Hope all is well. Cheers!
Hi simon and welcome to the forum
Title: Re: DNA20
Post by: studiovape on November 18, 2013, 07:36:12 AM
Finally got round to sealing up the module. Used hot glue, wow that stuff is a rel pain. Really got in a mess with it LOL. Got there in the end though, and feel much happier about it's longevity.
Title: Re: DNA20
Post by: simon28 on November 18, 2013, 09:40:17 AM
Hi simon and welcome to the forum

Thanks Breakthru!
Title: Re: DNA20
Post by: Lee1111 on November 27, 2013, 01:24:30 AM
I really enjoyed this thread. I want to build a wood box so bad, so I may have to pick one of these up.

Nice stuffing skills there breaktru. I'm impressed
Title: Re: DNA20
Post by: Breaktru on November 27, 2013, 08:29:33 AM
Thanks Lee. Luv to see what you come up with.
I've been stuffing small boxes for quite some time. Started with my .44 mini mod, .44+ and .44++ mini mod.
Title: Re: DNA20
Post by: kortt on November 27, 2013, 01:33:31 PM
Studiovape, that is one sexy mod!  What are the switch buttons made of and how do you hold them into the case?
Title: Re: DNA20
Post by: studiovape on November 27, 2013, 06:28:27 PM
Studiovape, that is one sexy mod!  What are the switch buttons made of and how do you hold them into the case?
Thanks mate, I have been a mech only guy for ages, but now the power available from the DNA20 and a real compact ( for 18650 ) build has found this mod permanently in use, plus something about the dark chocolate colour of the Queen Ebony is seductive.
But to answer your question, the smallest brass buttons were turned and cut from brass rod ( the large one from an industrial tap washer)on my pillar drill, when they were ground/sanded to close to To correct length I 'mashed' them into a flat file while spinning in the drill  to create a burr that acts as the retaining flange. Not a quick and easy job.i didn't like the metal micro switches others have used for their unavailability and extra space consumption in the overall build, so it was a labour of love that paid off.
Title: Re: DNA20
Post by: Jerseybob on November 27, 2013, 09:00:15 PM
(http://farm8.staticflickr.com/7379/10839624525_b320d8d5fb_z.jpg)

Looks like a piece of fine furniture. Excellent craftsmanship  :applaude:
Title: Re: DNA20
Post by: Boonos on March 14, 2014, 10:44:39 PM
thats awesome!
Title: Re: DNA20
Post by: studiovape on March 14, 2014, 11:57:48 PM
Been a while but I did finish my steampunk Dna20 here's a link to the pictures if anyone is interested
http://forums.aussievapers.com/modding-technical/21854-steampunk-dna20-bottom-feeder-studiovape.html
Title: Re: DNA20
Post by: Visus on March 15, 2014, 12:17:13 AM
@Studio

Sweeet
Title: Re: DNA20
Post by: fsors on March 15, 2014, 12:19:55 AM
Been a while but I did finish my steampunk Dna20 here's a link to the pictures if anyone is interested
http://forums.aussievapers.com/modding-technical/21854-steampunk-dna20-bottom-feeder-studiovape.html

cool is that a cartoon?
Title: Re: DNA20
Post by: Breaktru on March 15, 2014, 08:40:14 AM
Awesome looking mod studiovape  :thumbsup:
Title: Re: DNA20
Post by: Littlefeather on March 15, 2014, 01:51:02 PM
Been a while but I did finish my steampunk Dna20 here's a link to the pictures if anyone is interested
http://forums.aussievapers.com/modding-technical/21854-steampunk-dna20-bottom-feeder-studiovape.html

Very nice work on the steampunk also! Love the patinas from different techniques.
Title: Re: DNA20
Post by: Boonos on April 10, 2014, 12:25:34 AM
Been a while but I did finish my steampunk Dna20 here's a link to the pictures if anyone is interested
http://forums.aussievapers.com/modding-technical/21854-steampunk-dna20-bottom-feeder-studiovape.html

thats amazing! where did you get that temp gauge?

im currently making a wooden DNA30 box mod and was wondering about battery ventilation holes and whether i need them. Is this the reason you have a big hole in the enclosure?

Title: Re: DNA20
Post by: studiovape on April 10, 2014, 05:30:53 AM
thats amazing! where did you get that temp gauge?

im currently making a wooden DNA30 box mod and was wondering about battery ventilation holes and whether i need them. Is this the reason you have a big hole in the enclosure?
The temp gauge is made from two sections of brass pipe one slid over the other annealed and peened over with a hammer. Gauge dial face was designed and printed and cut out with a compass cutter, needle is from the second hand of a watch, glass is lexan cut with compass cutter, and guts/bimetallic coil are from a $2 plastic thermometer. time consuming.
The hole in the enclosure is to enable sqonking as it is a bottom feeder, but it would serve as a venting hole I suppose.
my box mods are never hemetically sealed as such, so even without the hole to squeeze the bottle through they would be unlikedly to explode  :D
Title: Re: DNA20
Post by: Suzukiv6 on May 10, 2014, 03:06:46 PM
 Hi this is my first post, I made a DNA20 box mod a while ago, thought you might like to see it. Can't get  photo to upload, Can anyone advise . Thanks.
Title: Re: DNA20
Post by: Breaktru on May 13, 2014, 05:56:12 PM
Hi this is my first post, I made a DNA20 box mod a while ago, thought you might like to see it. Can't get  photo to upload, Can anyone advise . Thanks.

Welcome to the forum.
See: THIS (http://breaktru.com/smf/index.php/topic,930.0.html)
Title: Re: DNA20
Post by: Suzukiv6 on May 13, 2014, 06:11:59 PM
Hi this is my first post, I made a DNA20 box mod a while ago, thought you might like to see it. Can't get  photo to upload, Can anyone advise . Thanks.
Title: Re: DNA20
Post by: Breaktru on May 13, 2014, 06:49:11 PM
Well done Suzukiv6  :rockin smiley:
Very well made with a touch of elegance
Title: Re: DNA20
Post by: breakstuff on May 13, 2014, 06:52:40 PM
Beautiful mod Suz  :beer-toast: What type of battery are you powering it with?
Title: Re: DNA20
Post by: Suzukiv6 on May 13, 2014, 07:03:46 PM
Hi  breakstuff, pleased you like it. I used an  18350 battery, I wanted to keep the mod small, and have made it so the bottom plate is quickly removed to change the battery, it unscrews with the aid of a coin. See photo.
Title: Re: DNA20
Post by: mamu on May 13, 2014, 07:22:55 PM
Gorgeous mod, Suzukiv6!  Do you have a name for it?

Single 18350?  How is that doing for you? 
Title: Re: DNA20
Post by: Suzukiv6 on May 13, 2014, 07:45:39 PM
Hi mamu  it's called a TVS20. I find the 18350 battery is fine for my use, I only use it with low settings ie 1.8 to 2.0 ohm coil set at 8.0 to 9.0 watts with 18mg tobacco . Two batteries  gives me a days vaping. 
Title: Re: DNA20
Post by: CraigHB on May 13, 2014, 08:17:34 PM
Wow that's nice looking, looks totally factory.
Title: Re: DNA20
Post by: Littlefeather on May 13, 2014, 10:00:44 PM
Suz! WOW! That there is puuuuurdy! Nicely done!
Title: Re: DNA20
Post by: Boonos on May 14, 2014, 05:38:43 AM
awesome  :rockin smiley:
Title: Re: DNA20
Post by: columbusbk on May 14, 2014, 08:56:15 AM
Yes awesome  :thumbsup:

Is that a pre-made case? I've seen a few mods like that.
Title: Re: DNA20
Post by: Suzukiv6 on May 14, 2014, 10:02:34 AM
Hi columbusbk, I made the case, in fact I made all the parts except the chip and button switches. The fire switch is home made. Here is a pic  of all the parts.
Title: Re: DNA20
Post by: Visus on May 14, 2014, 10:56:32 AM
super sharp suz

really cool how you made the 510 raised deck with the plug
 :thumbsup:
Title: Re: DNA20
Post by: Breaktru on May 14, 2014, 01:40:12 PM
Very skillful of you  :applaude:
Title: Re: DNA20
Post by: Suzukiv6 on May 14, 2014, 03:34:28 PM
Thanks for your  kind complements. My idea of publishing these mods is to show what can be done in the home workshop, with the hope of encouraging other vapers to have a go at mod making.
      Here are some pictures of another small DNA 20 mod I made. The box is made from some reclaimed mahogany and the white parts are reclaimed ivory with brass inserts. It has a 14500 800 mAH battery which with my preferred low settings works fine. I find this mod good for using when out and about with it being so small,and changing the battery only takes a few seconds using a coin to unscrew the bottom cap. The last photo shows two vent holes and a battery rattle adjusting screw in the slot of the bottom cap.
Title: Re: DNA20
Post by: Breaktru on May 14, 2014, 04:39:48 PM
Another masterpiece. I luv your handy work. Thank you for sharing with us  :rockin smiley:
Title: Re: DNA20
Post by: memoevapor on May 15, 2014, 10:33:40 PM
Very Very NICE Suzukiv6!  :applaude:
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 01:55:10 PM
Hi  I have made a SS button and bezel which fits over the tactile firing switch, a lot better to use with this fitted. See photo.
Title: Re: DNA20
Post by: Breaktru on May 29, 2014, 02:04:33 PM
Hi  I have made a SS button and bezel which fits over the tactile firing switch, a lot better to use with this fitted. See photo.

It came out excellent. Well done M8
Title: Re: DNA20
Post by: memoevapor on May 29, 2014, 05:12:40 PM
Very nice craftsmanship!  :yes"
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 06:00:07 PM
Suzukiv6

That is flat out clean. I've gotta try something like that. Well done sir! ;cheers;
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 06:07:42 PM
Do you mind if I ask what the overall dimension are? 14500? It almost appears there'd be enough room for 18490? Yes/No?
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 06:19:24 PM
BTW, I love the materials!
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 07:10:35 PM
Hi  littlefeather, Pleased you like the mod. The size is -  length 72mm x 22 mm wide  x  33mm deep. If you take a look at the pic above of it you will see I have fitted a tube to take the battery, so it will not take a battery of any other size. I did make another one with a 1200mAH round lipo battery and USB charger which are the same dimensions only the length is 90mm. Here is a pic of it . Hope this helps .
Title: Re: DNA20
Post by: simon28 on May 29, 2014, 07:32:29 PM
Hi  littlefeather, Pleased you like the mod. The size is -  length 72mm x 22 mm wide  x  33mm deep. If you take a look at the pic above of it you will see I have fitted a tube to take the battery, so it will not take a battery of any other size. I did make another one with a 1200mAH round lipo battery and USB charger which are the same dimensions only the length is 90mm. Here is a pic of it . Hope this helps .


Nicely done :thumbsup:

How do the batteries make connection in the tube?
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 07:54:26 PM
Hi Simon 28,  If you take a look at the photo , it shows the connections. ;cheers;
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 07:58:12 PM
Yup! I see that now. I'm thinking about the overall dimensions of the DNA20/30 and your box @ 72mm overall height and being only 33m deep, did you have to make a pretty radical bend in the OLED ribbon to get that fit?
Title: Re: DNA20
Post by: simon28 on May 29, 2014, 08:10:52 PM
Hi Simon 28,  If you take a look at the photo , it shows the connections. ;cheers;

 :thankyou:
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 08:12:41 PM
Hi  The screen is laying on the back of the DNA board. The screen and board are fixed in with a fine bead of araldite. Here is pic of the DNA fitted.
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 08:32:25 PM
Hi here is another couple of pic taken during construction. The top and bottom plates are  finished to size  after the box has been glued together. Also check the pictures  near the top of this page. Hope this helps .
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 08:35:13 PM
Very nice! That's some tight work! BTW I seem to remember something similar I saw on a video some time ago. Looked to have very similar aesthetic. The owner wasn't the maker and was just plain chuffed.  By chance was that some of your work? :yes"
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 08:43:47 PM
Looks like you've got some more in the works. I love to see what craftsmen come up with!
Title: Re: DNA20
Post by: Suzukiv6 on May 29, 2014, 08:58:56 PM
Very nice! That's some tight work! BTW I seem to remember something similar I saw on a video some time ago. Looked to have very similar aesthetic. The owner wasn't the maker and was just plain chuffed.  By chance was that some of your work?

Hi I think it could have been, if it was a video made by Todd of Todds Reviews here in GB  it was. That was very observant of you . :yes"
Title: Re: DNA20
Post by: Littlefeather on May 29, 2014, 09:11:49 PM
Yup, that would be the one. He was liking it and so he should! BTW thank you! You've given me some very good inspiration.
Title: Re: DNA20
Post by: Ness42 on June 17, 2014, 04:49:15 PM
sorry I am  a Noob here. so i have a question in this picture can someone tell me what is that chip under U6 in this board. one of my atomizers keeps burning it and i already used and old vamo v5 to fix it but it burned again. the board works but there is no power to the 510 connection. were could i find some of this ones to fix my DNA 20. thank you.
(http://i.xomf.com/ycbsb.jpg)
Title: Re: DNA20
Post by: Suzukiv6 on June 17, 2014, 05:42:35 PM
sorry I am  a Noob here. so i have a question in this picture can someone tell me what is that chip under U6 in this board. one of my atomizers keeps burning it and i already used and old vamo v5 to fix it but it burned again. the board works but there is no power to the 510 connection. were could i find some of this ones to fix my DNA 20. thank you.
(http://i.xomf.com/ycbsb.jpg)
Hi I was going to suggest you send it back to Evolv, they repair their DNA 20 quite cheaply, but  I don't think your  DNA 20 was made by Evolv, unless they have changed their layout of the board. Here is a pic of genuine one of mine for you to compare.
Title: Re: DNA20
Post by: CraigHB on June 17, 2014, 06:14:14 PM
The quality of the parts used on your board is not as good as the DNA board pictured below.  I don't think the design would have changed that radically from one revision to another.  Where did you get your board?

In any case, that U6 part is a power MOSFET.  If you can get a number off one that isn't burned up, you could replace it.  That part is burning out due to overload which should not be happening under any conditions if the board is operating the way it should. 

Title: Re: DNA20
Post by: miskol on June 18, 2014, 03:44:53 AM
were could i find some of this ones to fix my DNA 20. thank you.

that is NOT Evolv DNA 20, that's DNA 20/30/32 (clone) from hotcig, China.
Title: Re: DNA20
Post by: ant1 on June 24, 2014, 04:20:36 PM
After reading about all the great DIY mods here, I finally got around to making one,

The eggplant is a compact DIY evolv DNA20D based 18650 battery mod, built out of carbon fiber / epoxy and aluminum

Dimensions : 74 * 44 * 22 mm ( h: 2 15/16? w: 1 3/4? d: 7/8? )

If you want to make your own DIY eggplant mod I've posted a how-to, pictures, the bill of materials, usefull DIY mod making guides I used, etc. here :

http://eggplantmod.wordpress.com/ (http://eggplantmod.wordpress.com/)

Have fun :)

ps : Is there a way to embed videos in forum posts, and how can I create a topic in the modding forum ? thanks :)