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Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: DNA20
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Author Topic: DNA20  (Read 95683 times)

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Online Breaktru

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Re: DNA20
« Reply #50 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.

Offline Haileah

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Re: DNA20
« Reply #51 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:

Offline CraigHB

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Re: DNA20
« Reply #52 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.

Offline fsors

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Re: DNA20
« Reply #53 on: December 13, 2012, 11:43:04 PM »
Dave amazing work getting all that into a box that small cool stealth mod! :beer-toast:

Offline redwolfe

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Re: DNA20
« Reply #54 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.

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Re: DNA20
« Reply #55 on: December 15, 2012, 05:09:00 PM »

Offline Pantera

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Re: DNA20
« Reply #56 on: December 15, 2012, 06:00:57 PM »
Now that's what I'm talkin about. Fantastic breaktru  ;cheers;

Offline Haileah

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Re: DNA20
« Reply #57 on: December 15, 2012, 06:03:11 PM »
Raw power in the palm of your hands  :rockin smiley:

Offline thetruckinggeek

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Re: DNA20
« Reply #58 on: December 15, 2012, 06:04:17 PM »
Very :thumbsup: Nice work

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Re: DNA20
« Reply #59 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

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Re: DNA20
« Reply #60 on: December 15, 2012, 10:06:13 PM »
Thanks guys

Offline styl3r

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Re: DNA20
« Reply #61 on: December 16, 2012, 07:52:21 AM »
Nice one good work as usual, just out of curiosity what is battery run time?

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Re: DNA20
« Reply #62 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.

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Re: DNA20
« Reply #63 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.

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Re: DNA20
« Reply #64 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.

Offline SmokeRings

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Re: DNA20
« Reply #65 on: December 16, 2012, 11:49:20 AM »
 ;hubba; this would be my ultimate mod  :beer-toast:

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Re: DNA20
« Reply #66 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:

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Re: DNA20
« Reply #67 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.

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Re: DNA20
« Reply #68 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.
« Last Edit: December 17, 2012, 10:06:28 PM by Breaktru »

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Re: DNA20
« Reply #69 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.

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Re: DNA20
« Reply #70 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.

Offline Brian9523

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Re: DNA20
« Reply #71 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:

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Re: DNA20
« Reply #72 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

Offline redwolfe

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Re: DNA20
« Reply #73 on: December 21, 2012, 03:25:52 PM »
I got mine ordered and on the way! Cant wait!

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Re: DNA20
« Reply #74 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

Offline thetruckinggeek

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Re: DNA20
« Reply #75 on: December 21, 2012, 03:57:37 PM »
How much were thay? :help:

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Re: DNA20
« Reply #76 on: December 21, 2012, 04:29:00 PM »
I paid 51.49 shipped for 1 single board

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Re: DNA20
« Reply #77 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

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!
« Last Edit: December 22, 2012, 01:26:59 AM by timesarerough »

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Re: DNA20
« Reply #78 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
« Last Edit: October 07, 2013, 04:02:06 PM by Breaktru »

Offline CraigHB

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Re: DNA20
« Reply #79 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.

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Re: DNA20
« Reply #80 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
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


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.

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Re: DNA20
« Reply #81 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....

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Re: DNA20
« Reply #82 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.


« Last Edit: December 22, 2012, 08:17:05 PM by CraigHB »

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Re: DNA20
« Reply #83 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.

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Re: DNA20
« Reply #84 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:

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Re: DNA20
« Reply #85 on: January 01, 2013, 03:50:50 PM »
Cool breaktru  :rockin smiley: very nice

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Re: DNA20
« Reply #86 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

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Re: DNA20
« Reply #87 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. 
« Last Edit: January 12, 2013, 02:16:49 PM by synchro »

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Re: DNA20
« Reply #88 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.

Offline kortt

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Re: DNA20
« Reply #89 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:

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Re: DNA20
« Reply #90 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 ?

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Re: DNA20
« Reply #91 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

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Re: DNA20
« Reply #92 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
« Last Edit: September 19, 2014, 09:19:43 AM by Breaktru »

Offline kortt

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Re: DNA20
« Reply #93 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?

Offline redwolfe

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Re: DNA20
« Reply #94 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.

Offline zeus17

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Re: DNA20
« Reply #95 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...

Offline digiw0rx

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Re: DNA20
« Reply #96 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!

Offline zeus17

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Re: DNA20
« Reply #97 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....

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Re: DNA20
« Reply #98 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.

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Re: DNA20
« Reply #99 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:

Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: DNA20
 

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