Breaktru Forum

eCigarette Forum => Modding => Topic started by: Breaktru on May 16, 2011, 07:42:08 AM

Title: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on May 16, 2011, 07:42:08 AM
(http://breaktru.com/temp/coppersnake_sm.jpg)
"Copper on Copper"


I adapted the Digital Potentiometer for the TI PTR08100w regulator being that the reg needed a pot resistance of 200 ohms and the smallest D.P. is 10k ohms. Actually got it to work in a range of 2.05v :o to 5.66v
3 Bullets have been used to build it. .44 cal magnum rim for the touch sw base and two .22 cal casings to connect the caps and route wiring through.

I put in a Mosfet touch switch. My preliminary bench test with an N-Channel Mosfet produced an output voltage w/ Mosfet off. I realized that I missed breaking ONE neg wire. ALL neg wires have to be broken through the mosfet in order for it to work.
A P-Channel Mosfet is the best choice for a METAL tube mod. Being that I am using two 18350, 1200mah's totaling 7.4v to 8.4v's and most of the Mosfet's have a Gate Threshold Voltage or 2v to 4v to fully turn on the chip, I used a 100meg ohm resistor across the Gate to Source pins and it worked perfectly. I could possibly have used a 20 meg ohm which I did not have on hand and putting two 10m in series would have taken more precious space.
I used a STP12PF06 mosfet because that's what I had on hand. It's a large TO-220 footprint, I'd advise a smaller footprint.

The tubes are adjustable by just sliding in or out. They can hold many types and size batteries. You can fit two 18650's (18mm diameter) down to 18350's. For smaller diameter batteries such as 17500 (17mm), 16340 & RCR123a (16mm) and 14500 (14mm), a filler tube can be placed around the battery.

**I am happy to share info with all that drop by this forum. So dropping a mention when you post your mod elsewhere would be a decent gesture.
Show your support by signing up as a member and please participate by posting**
Title: Re: Side x Side Copper V.V. w/ Digital Pot
Post by: Breaktru on May 16, 2011, 04:42:56 PM
Side by Side

(http://breaktru.com/temp/side-x-side-1.jpg)(http://breaktru.com/temp/side-x-side-2.jpg)(http://breaktru.com/temp/side-x-side-3.jpg)(http://breaktru.com/temp/side-x-side-4.jpg)(http://breaktru.com/temp/side-x-side-5.jpg)(http://breaktru.com/temp/side-x-side-6.jpg)(http://breaktru.com/temp/sxs.jpg)(http://breaktru.com/temp/side-x-side-7.jpg)


The tubes are adjustable by just sliding in or out. They can hold many types and size batteries. You can fit two 18650's (18mm diameter) down to 18350's. For smaller diameter batteries such as 17500 (17mm), 16340 & RCR123a (16mm) and 14500 (14mm), a filler tube can be placed around the battery.
(http://breaktru.com/temp/side-x-side-slide1.jpg)(http://breaktru.com/temp/side-x-side-slide2.jpg) Photo to left has the 18650's

To See Attached Photo, Log on as a Member..
Title: Re: Side x Side Copper V.V. w/ Digital Pot
Post by: asnider123 on May 19, 2011, 11:53:37 PM
Yer my hero  ;D  Looks really neat! Is it gonna be double-barreled?

Alan

PS: thanks for the cd, look forward to browsing it this weekend.
Title: Re: Side x Side Copper V.V. w/ Digital Pot
Post by: asnider123 on May 21, 2011, 12:01:41 AM
What's inside:
WOW!!! Really cool, has everything but a digi readout! Love your P-channel touch switch, good idea! Couple of questions ..

Where are you gonna fine a 100M resistor? I have had to resort to a 10M in my touch-switches.
What does the inhibit do (I assume it acts like a FET to control the VR) .. if so, is the FET really necessary?

Sorry for the dumb questions, but I was curious :)
Title: Re: Side x Side Copper V.V. w/ Digital Pot
Post by: Breaktru on May 21, 2011, 12:12:44 AM
100m ohms at Digikey. I've tried every value under 100m and I couldn't get it to turn fully on unless it was a 100m.

You can use a low current tactile N/C sw from the inhibit to ground. But the chip will continue to draw low ma's while idle.
Title: Re: Side x Side Copper V.V. w/ Digital Pot
Post by: asnider123 on May 21, 2011, 01:03:07 AM
100m ohms at Digikey. I've tried every value under 100m and I couldn't get it to turn fully on unless it was a 100m.

You can use a low current tactile N/C sw from the inhibit to ground. But the chip will continue to draw low ma's while idle.
I do notice that, with a 10M resistor, sometimes it won't work unless your finger is slightly moist .. that explains a lot :) .. What's the 1K used for? I have used my touchie circuit with and without it, seems to work the same either way???
Title: Re: Side x Side Copper V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on May 21, 2011, 07:06:55 PM
I do notice that, with a 10M resistor, sometimes it won't work unless your finger is slightly moist .. that explains a lot :) .. What's the 1K used for? I have used my touchie circuit with and without it, seems to work the same either way???

Actually Alan the Gate Threshold voltage on this particular Mosfet (common on most P-ch mosfets) is 2v - 4v. Perfect for two 3.7v batteries.
I am supplying 7.4v to 8.4v. So the 100 meg ohm brings the gate voltage down.
A 10 meg  would exceed the Vgs at 7.45 volts. However a 20 meg should just about do it a 3.91 volts (falls in the 2v-4v *Vgs)
The above resistor / voltages are readings I made and not calculated (real time testing).
* Vgs =Gate Threshold Voltage

Yes it works without the 1k resistor. I believe the 1K will protect the Mosfet from burning out. Not really sure. I've seen schematics with a pushbutton and NO resistor.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: asnider123 on May 22, 2011, 06:51:58 PM
Excellent!! You always come up with the best stuff!! Tell me, are both 18350's in one tube or did you put one in each tube and wire them in series? Love your touch pad :)

Since you are into ammo, I think one made from a pair of 12ga 3.5" metal shells would look cool  ???

Thanks for posting the pics of the finished product, awesome .....
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on May 22, 2011, 07:00:59 PM
18350's, one in each tube.
12ga would be nice. I have 12ga 3" magnum slugs but they are not all metal casings.
Have never seen metal casings.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Pantera on May 22, 2011, 07:07:15 PM
Uh-Fa, that is fantast-ical
Hat off my friend to you!
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: asnider123 on May 22, 2011, 07:26:31 PM
18350's, one in each tube.
12ga would be nice. I have 12ga 3" magnum slugs but they are not all metal casings.
Have never seen metal casings.
The Ruskies make a 2-3/4" metaL cased 12ga, I am sure longer ones are probably available too ????
(http://image.sportsmansguide.com/dimage/82949_ts.JPG?cell=320,320&cvt=jpeg)

Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on May 22, 2011, 07:38:16 PM
Ahhhhh, the Russkies. Couldn't find them in the US market.
Go for it Alan. Like to see a mod out that.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: asnider123 on May 22, 2011, 08:28:19 PM
Here's a listing for a 10-pack of em for 5 bucks plus shipping. The more you buy the cheaper the shipping per pkg. Betcha you have an ammo dealer that carries them, or maybe check your local gunshow.

Made by Silver Bear
http://www.rrarms.com/catalog.php?prod=ACA128 (http://www.rrarms.com/catalog.php?prod=ACA128)
(http://www.rrarms.com/cat_images/ACA128.JPG)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Aromaz on May 23, 2011, 07:01:54 PM
Crazy good Dave. Great work. So many features crammed in there. I love the Bullet thingy. You must get a lot of inquires about it.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vapemistress on May 23, 2011, 08:03:24 PM
Stupendous Dave. That's the best homemade mod I've seen to date!
I simply love it. breaktru ROCKS  :P
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vapertina on May 26, 2011, 10:22:09 AM
Stupendous Dave. That's the best homemade mod I've seen to date!
I simply love it. breaktru ROCKS  :P

Ditto for me too! Luv it.
Please, I got to have one :-*. If you don't start making these for us, I'm going to hold my breath until you do...  :P
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: dannyboy on May 27, 2011, 06:29:42 AM
Dude, you've done it again. holy $h^t, that is the best mod.
I want to take the time to thank you for the inspiration that you gave me and help that your gave me with all my silly PM questions that you answered.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: steamEngine on May 27, 2011, 04:01:57 PM
steamEngine here, it's full steam ahead breaktru. You inspired me to build a Side x Side. Don't know if I can get the circuitry as tight as you did but I'm going to try. Your a Master of Mods my friend. My old lady may hear some cursing coming from the basement. Better warn her before I start the build. :o
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on May 27, 2011, 05:11:00 PM
Carrying the "Side x Side"

(http://breaktru.com/temp/case-3.jpg)  (http://breaktru.com/temp/case-4.jpg)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vaporhead on May 28, 2011, 11:17:46 AM
Holy cow breaktru. That is such a fantastic mod. Unbelievable. You are truly remarkable.
I thank you for sharing this with the community. I love the touch sensor and the series
battery by connecting two tubes with the bullet casings. That's ingenious.
Who da Man? Yu da Man! Fo sure!
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: elzakivis on May 28, 2011, 11:28:13 AM
I second everything that vaporhead said and more.
I wish you would market that PV. You would be rich for sure.
So cool and powerful. You know someone is going to steal it and claim it as their own like that Buzz guy.
Save these pages as proof that you made it first.
Can't wait to see your next mod. I think it would be hard to top this one breaktru.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: FluGlone on May 28, 2011, 03:57:39 PM
Now that's a handful of PV. Me Like. Very much.
Please sell me one! ;D
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: breaktru_software on May 28, 2011, 04:04:58 PM
Thank you for the kind words. Glad you guys like it.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vaperkarma on May 28, 2011, 06:28:42 PM
If they had an American Idol for Mods, you would win hands down. That is an awesome piece of work.
Thank you for offering all the details for all of us to view.
By the way your eJuice Me Up eJuice calculator is spectacular as well. It is very popular on several foreign ecig forums. I found it on a German forum.
What else do you do? Do you make space ships?  :D
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: d_walk on May 29, 2011, 07:08:28 PM
Man your my hero. Got to hire you as my personal Mod builder. I like this one very much.
Now this is a Real Mans Mod. I would trade you my ProVari for this in a heart beat.
Who needs the girly display. Set it once and forget it.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: shirl on May 30, 2011, 07:32:22 AM
Your mod and mods are beautiful. Very professional. You should go into business and make some for us droolers.
I'm always checking in to see what's next.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Dasen22 on May 30, 2011, 06:42:19 PM
The famous Mr. Breaktru and his mystical Mods. You are very famous among the vaping community.
This is one hell of a PV my friend. What can I say that the others haven't already. Wow!
and thank you for sharing.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: missyvape on June 01, 2011, 03:10:39 PM
Very Sexy looking.
Maybe a bit heavy for my delicate hands.
Perhaps a couple of 14250's ? I'll PayPal you?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: jomurp on June 01, 2011, 03:30:38 PM
Very Sexy looking.
Maybe a bit heavy for my delicate hands.
Perhaps a couple of 14250's ? I'll PayPal you?

Those 14250's are only 350mah at most and won't last very long.
You would be better off with 16340's. The highest I've seen are 880mah and 1000mah.
But I like with breaktru used, 18350's, 1200mah. Anything bigger would be too heavy.
Well done breaktru.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Dalton63841 on June 05, 2011, 12:16:58 AM
This is really beautifully done. If I may ask, what is the part number for the p-channel FET you are using?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on June 05, 2011, 08:30:33 AM
One more question .. you have a digi pot in your diagram, how do you control it? A pair of buttons or ???

There are 3 ways.
1 switch for up/down voltage control
2 switches, 1 for up and 1 for down
CPU controlled

I chose the 1 switch. Like I put in my Booster Mod (http://breaktru.com/smf/index.php/topic,177.0.html)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on June 05, 2011, 08:50:45 AM
This is really beautifully done. If I may ask, what is the part number for the p-channel FET you are using?

I used a STP12PF06 mosfet because that's what I had on hand. It's a large TO-220 footprint, I'd advise a smaller footprint.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vapemistress on June 07, 2011, 06:20:32 PM
The concept of putting different batteries in without have to change tubes or parts
is a fantastic way to do it. Just slide the tube in or out, wow. Great work breaktru.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on June 09, 2011, 07:38:34 AM
The concept of putting different batteries in without have to change tubes or parts
is a fantastic way to do it. Just slide the tube in or out, wow. Great work breaktru.
Thank you V.M.,
This would be perfect for you with two 16340's. It would be lighter in weight for sure.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: FlameOut on June 09, 2011, 02:21:18 PM
Using two 18650's would be one POWER HOUSE of a mod.
That's the route I would take. It's fantastic that this mod can also take that size batteries as well as the smaller sized. :o
IMO the 08100w regulator and the 18650 batteries are top performers. :P
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: octoman on June 10, 2011, 06:32:33 AM
Man breaktru, I don't know how you manage to get such tight tolerances.
It's amazing how you put this thing together.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Mimms on June 11, 2011, 05:50:02 PM
(http://breaktru.com/temp/coppersnake_sm.jpg)

That's a smart comparison in the photo.
A Copperhead Snake next to a Copper Mod.  :D
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Poppy26 on June 12, 2011, 06:36:24 PM
Wow a copper on copper. Nice going. :D
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Brian9523 on June 24, 2011, 04:11:10 PM
Now I know why over a ECF they call you one of the Mod Gods
Spectacular work.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: rrtwister on July 16, 2011, 08:39:04 PM
Can I use 100uf 50v caps? Are the compatible?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on July 16, 2011, 08:44:12 PM
Can I use 100uf 50v caps? Are the compatible?

Yes they will work rr but they will be physically larger. If you're going to squeeze them into a tube, I would go with 10v or even 16v caps. Also be aware that the tantalum are smaller than the Aluminum but cost a little more. I mostly use Tantalum 10v.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on July 20, 2011, 10:28:20 AM
Recieved a post over at ECF from M.M.M. about how I keep the copper shiny and how often.......

I use #0000 grade steel wool about once a week. Takes about 5 seconds to make it shiny bright again.
Warning, leave the atty on so not to get any tiny metal hairs into the battery to atty connector. Don't wan't to cause a short. There so dam small and you may not notice it.
Also, be careful if you're buffing w/ S.W. with the tubes off. That stuff can get inside the circuitry and short out the internals.
Haven't tried the Scotch pads. They may work but I'm sure it would be more effort to shine to a bright finish.

Update: Scotch pads work fine. Comes in several grades.

Don't use too coarse of a grade of steel wool or scotch pads. You don't want to make scratches in your copper. Takes a lot of effort to remove them.

(http://breaktru.com/ecig/3m_scotch_grade.gif)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: novoleen on July 25, 2011, 06:55:47 PM
Carrying the "Side x Side"

(http://breaktru.com/temp/case-3.jpg)  (http://breaktru.com/temp/case-4.jpg)

Nice way to carry that sucker. Very good breaktru. Impressive piece of work.
I found the link to your Side x Side on an Australian Forum. You do get around my friend.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: vaporhead on July 28, 2011, 07:11:54 PM
I still marvel over this mod. I check this thread once in awhile just to ooogle over it.
Excuse my drool. Need to wipe my keyboard  :P
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on July 28, 2011, 07:24:17 PM
Thank you V.H. Glad you appreciate it.

Take a look at Alan's Mods (asnider). They are really cool and unique. He's a fantastic modder and a great guy.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: timesarerough on July 29, 2011, 01:05:24 AM
NO DOUBT, I second that motion!

Not to downgrade Dave's genius, you gotta go see Al's collection....

The guy is an amazing inventor, he's creating new ones daily.

How many does he have now, Dave? 100? 200?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on August 06, 2011, 07:55:02 AM
See this link when working with a Digital Potentiometer:
http://breaktru.com/smf/index.php/topic,177.msg1115.html#msg1115 (http://breaktru.com/smf/index.php/topic,177.msg1115.html#msg1115)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: ChainVaper on August 12, 2011, 08:51:41 AM
This is pure Wizardry. The ULTIMATE mod.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: FlameOut on November 02, 2011, 09:06:32 AM
I've tried and failed to make something like this mod.
This would be my ultimate mod.
Can I buy one from your breaktru?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on November 02, 2011, 09:11:07 AM
I've tried and failed to make something like this mod.
This would be my ultimate mod.
Can I buy one from you breaktru?

I would love to make Side x Sides for sale
but are just too labor intense.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on November 14, 2011, 04:46:02 PM
Digital Potentiometer:

Note on Parallel resistor for pot wiper - The way I have the 18 ohm across the 10k D.P. wiper will effect the Linearity of the pot making fine adjustments impossible as voltage stepping are large jumps. It is very hard to adjust with a 1s6s DM because you have to wait for the pulsing display and a little more practical to adjust w/ a multi-meter. Several attempts maybe be needed to find your desired target voltage.
See graph image below.
To calculate your own values see: http://www.mindspring.com/~clist/PotGraph.html (http://www.mindspring.com/~clist/PotGraph.html)

Just found this but haven't tried it yet:
Tricking a pot to be Linear w/ parallel resistor see: http://www.diystompboxes.com/analogalchemy/emh/emh.html (http://www.diystompboxes.com/analogalchemy/emh/emh.html)
and image below..

UPDATE: I have tried the tricking a pot method and it does not help make the pot Linear. Adjusting voltages through-out the voltage range jumps in leaps and is hard to adjust for accuracy.

Schematic visible to logged in members...........
Circuit sa ibaba makikita lamang sa mga naka-log sa mga miyembro
Circuito de abajo sólo son visibles para los miembros conectado
Schaltung unten nur sichtbar für eingeloggte Mitglieder auf
Circuitul de mai jos vizibile numai de catre autentificat pe membrii
Circuit ci-dessous uniquement visible pour les membres connectés
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: MidnighToker on January 04, 2012, 06:37:37 PM
Thanks for the pointer to this breaktru.  Exactly what I was looking for....now just to play with the parallel resistor values to get what I want.  May mess with that "trick" to see about getting it more linear.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: MidnighToker on January 09, 2012, 11:20:07 PM
Hey BT...have you ever tried messing with the parallel/linear pot "trick"?  Was just drawing it out and it doesn't seem like it would be possible (well, at least not with those exact numbers) here because you where you should be placing a 10 ohm for R2, there is already the limiting 220 ohm resistor in place, so you would essentially be running 230 in series on the R2 leg.


ETA - OK, I think I read that wrong...in this case you would want to run R2 to Rh (V+ in this instance), correct?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on January 10, 2012, 07:52:17 AM

ETA - OK, I think I read that wrong...in this case you would want to run R2 to Rh (V+ in this instance), correct?

Haven't yet tried it but yes I believe the value of R2 should be between Rh to V+.
Remember, the values are in KiloOhms. So that would be 100 ohms for R1 and 100 ohms for R2.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: MidnighToker on January 10, 2012, 09:07:10 AM
Haven't yet tried it but yes I believe the value of R2 should be between Rh to V+.
Remember, the values are in KiloOhms. So that would be 100 ohms for R1 and 100 ohms for R2.
Thanks for catching that...I really need to learn to not look at any of my technical $#!+ after the kids have gotten me all pissed off.  :thumbsup:

Just waiting on parts from Digikey (don't feel like pissing my money away at RS...).  Thankfully I grabbed an assortments of resistors to stock up (including 100 ohms)  Will let you know how this works out.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: MidnighToker on January 16, 2012, 03:38:04 PM
I dunno what my problem is, but I can not get anything out of the DS1869-10 on the breadboard.

With no power I get a reading of 8.7k from Rh to Rl.  Open circuit from either to Rw.  When I power it up, the meter shows a dead short from Rw to both Rh and Rl.  A few times I did get a reading  from Rw to Rl when pressing the DC adjust button (have tactiles on there right now) repeatedly, but went right back to a dead short when I pressed UC.  Never got any reading (dead short) from Rh to Rw.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: matt_jv on March 18, 2012, 06:06:28 PM
Hi all i am currently trying to build my mod using the OKR-T/6 with DP but am strugling with how to wire the resistors for the linear pot trick if any one could
help id be very grateful

thanks all
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on March 19, 2012, 06:57:03 PM
Just came out of my work shop (garage) after trying the Linear pot trick.... It does NOT work as stated in the authors documentation. If you try it as described w/ a standard 10k trimmer pot w/ the two 100 ohm resistors, you'll get 110 - 200 ohms at the halfway point, then the resistance decrements from 200 - 110 ohms.

On the D.P. the best method is my original schematic shown w/ one 18 ohm resistor. I want to point out that this method has a negative effect on the linearity of the pot especially the higher resistance end (lower voltage scale). The DS1869 has 64 steps. More steps would help the linearity. 128 or 256 steps would make a smoother scale.

The OKR, 08100w and the 08060w require a 200 ohm pot. Substituting it for a 10k ohm pot has some drawbacks. It will work but not as good as a 200 ohm pot.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: matt_jv on March 22, 2012, 06:04:35 PM
thank you for the feed back you have saved me ALOT of brain ache. i think I'm going to stick with the 200 ohm pot with the okr and keep with the 100k DP on the 4050c until someone comes out with a DP more suitable with push button control.

On a slightly different note do you think these mosfets would be OK for a tact switch

IRLU9343PbF

Vds 55v
Vgs 20V
Id 20A
Vgs(th) -1V

Once again thank you for your help its been a real help since vaping not only am i saving money feeling healthier i have also found my self with a new hobby  :thumbsup:
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on March 22, 2012, 07:49:53 PM
thank you for the feed back you have saved me ALOT of brain ache. i think I'm going to stick with the 200 ohm pot with the okr and keep with the 100k DP on the 4050c until someone comes out with a DP more suitable with push button control.

On a slightly different note do you think these mosfets would be OK for a tact switch

IRLU9343PbF

Vds 55v
Vgs 20V
Id 20A
Vgs(th) -1V

Once again thank you for your help its been a real help since vaping not only am i saving money feeling healthier i have also found my self with a new hobby  :thumbsup:

Looks like that Mosfet will work.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: PoppaVic60 on October 10, 2012, 02:16:49 PM
Breaktru:

Is that 2 diameters of tubing, or a pair of couplers and 4 tubes? (I can see 4 endcaps Jus' Fine ;-)

I'm trying to plan a trip to Home Depot ;-)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on October 10, 2012, 03:10:34 PM
(http://breaktru.com/temp/side-x-side-slide1.jpg)(http://breaktru.com/temp/side-x-side-slide2.jpg)

As shown in the photos, we have....
4 End Caps
4 Tubing
2 Couplers
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: PoppaVic60 on October 10, 2012, 03:20:30 PM
Thanks, Chief..

I couldn't tell if that was next-size-larger tube or couplers.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Phestr on July 04, 2013, 12:33:14 AM
Okay, this might be a dumb question, but do you have to insulate the outside of the switch from the tube?  If you used two different contacts instead of one inside the other, would you insulate both?  I know they have to be insulated from each other, but from the body?  Excellent mod, by the way, but it's a long way off for me.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on July 04, 2013, 06:20:16 AM
Okay, this might be a dumb question, but do you have to insulate the outside of the switch from the tube?  If you used two different contacts instead of one inside the other, would you insulate both?  I know they have to be insulated from each other, but from the body?  Excellent mod, by the way, but it's a long way off for me.

Not a dumb question. If you look at the circuit in "Reply #50" you will see that the touch switch is triggered by the ground/negative. The tubing is ground/negative. So NO it should NOT be isolated. It is necessary to have the switch outer rim contact ground/negative and the center wired to the mosfet gate while maintaining isolation between center and outer portion of the contact points (the so-called switch).
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: hilltopnumbah92 on February 03, 2014, 06:16:04 PM
Hey how's it goin. Hey break thru i really do admire the great amount of quality craftsmanship that you display in the mods you create. Especially when I came across this side by side copper mod. This thing is rad. Its exactly what I'd like to build being that its not skinny long and lanky. But looks solid the way you put it together I think I would like to do a side to side piece like yours but without the circuitry and just do like a plunger style switch rather than the touch switch. I guess its Cuz all the eletronics kinda freaks me out me not being well versed in the circuit. But  I'm gonna take a stab at it and show you guys my progress. I guess I caught that bug.  Hey breakthru the thing that leaves me dumbfounded is the way you fit the two tubes together side by side. Are you using flux and solder? Or epoxy? Hardware nut and bolt?  Damn this thing is cool man. I really gotta know how you fit everything in such a tight spot and put it all together. Awesome . Peace and aloha from hawaii to everybody on this forum seems like the vibe on his forum is cool  compared to some of the others.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on February 03, 2014, 07:23:24 PM
Hey hilltop. Thanks, glad you like my work.

I used two brass .22 cal casings to connect the two top caps and the two bottom caps. They're hollow so I can route wiring through them. They are soldered to the caps.
If it's a mech mod w/ no circuitry you can use a cut down nut and bolt for the bottom cap being you won't need to connect any wiring. Mine were series batteries so I had to run a jumper wire thru it.
On the two top caps you can use a threaded nipple with a nut on each end and run a positive wire thru the nipple to the 510 connector.
The tubing will conduct your negative for the 510 outer base and the battery negative spring.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on March 26, 2014, 12:46:16 AM
Breaktru,

I'm getting ready to build this board for my 1st. mod. You diagram shows batteries in series. I'm planning 2x 19650 Panasonic NCR18650PF 3.6V 2900mAh. Question; can I wire them in parallel? would make usb charging easier.

Jasen
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on March 26, 2014, 07:49:03 AM
Breaktru,

I'm getting ready to build this board for my 1st. mod. You diagram shows batteries in series. I'm planning 2x 19650 Panasonic NCR18650PF 3.6V 2900mAh. Question; can I wire them in parallel? would make usb charging easier.

Jasen


Series batteries for step down converters (such as this) which require an input between 4.5v - 14v. You would need to use a boost converter for parallel batteries and require and input source between 2.95v - 5.5v which is a different circuit not used in this Side x Side thread.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on March 26, 2014, 09:51:44 PM
I fallow ya  :)
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on April 05, 2014, 02:24:32 PM
Breaktru,

I've determined a big atty switch isn't going to fit in my mod and I want a flush mount switch, so it looks like I'll be using a tact switch. Can I use the smaller IRLU9343PbF mosfet in place of the STP12PF06 and wire it off my NTE 500-0099-BU 200ohm pot the same as you have here in your digital pot schematic.

(http://STP12PF06) Picture isn't showing up. I'm referring to the bottom schematic in your post #50

Jasen
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on April 06, 2014, 10:45:40 AM
I think this P-Channel Power Mosfet IPD90P03P4-04 (http://www.mouser.com/ProductDetail/Infineon-Technologies/IPD90P03P4-04/?qs=sGAEpiMZZMshyDBzk1%2fWi9Xn%2fBYY8cyRypmGTibqaKg%3d) would be better suited as it has a Low Drain-source on-state resistance RDS(on) rating of only 4.5 mOhms
Gate threshold voltage VGS(th) is: Min -2.0, Typ -3.0 Max -4.0
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on April 06, 2014, 01:00:00 PM
I see what your saying. I'm starting to glimpse into this stuff.

Thanx again
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on April 06, 2014, 04:35:12 PM
Forgot to mention, being you are not using it as a touch and using a tact, you can use a 15K resistor rather than the 100M ohm
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on April 06, 2014, 06:41:49 PM
Now you tell me, after I got out my 20x magnifying glass and quad halogen lights to read the stripes  raged:  :laughing:

Thanx

Hey whats a good operating force for a tact switch
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Breaktru on April 06, 2014, 06:58:06 PM
My earlier mods were 100g force but they became hard to get (out of stock). 300g is a bit stiff. The 200g are nice. Been using them in my latest mods.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: CraigHB on April 07, 2014, 03:51:56 PM
I'll second the 200g tactiles.  All tactiles lighten up a bit with wear and the 100s can get too light. 
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on April 07, 2014, 08:17:01 PM
Haven't found any 200's yet, but did see a lot of 160g's.

At least now I have a starting point.

Thanx
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on May 17, 2014, 01:18:38 AM
I think this P-Channel Power Mosfet IPD90P03P4-04 (http://www.mouser.com/ProductDetail/Infineon-Technologies/IPD90P03P4-04/?qs=sGAEpiMZZMshyDBzk1%2fWi9Xn%2fBYY8cyRypmGTibqaKg%3d) would be better suited as it has a Low Drain-source on-state resistance RDS(on) rating of only 4.5 mOhms
Gate threshold voltage VGS(th) is: Min -2.0, Typ -3.0 Max -4.0

Need to find an alternative for the IPD90P03P4-04 mosfet, digikey and mouser both have it listed on back order for a few months and haven't found any through chipfinder. I couldn't find anything within those specs and don't know how far I can stray. Any suggestions?
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on May 17, 2014, 01:27:39 PM
I think either of these FET's will do. Not sure what rise time is (power recovery?) but the second FET has a quicker rise time.

Vishay #SUP75P03-07-E3
   
Transistor Polarity:   P-Channel   
Drain-Source Breakdown Voltage:   30 V   
Gate-Source Breakdown Voltage:   +/- 20 V   
Continuous Drain Current:   75 A   
Rds On:   7 mOhms   
Configuration:   Single   
Maximum Operating Temperature:   + 175 C   
Mounting Style:   Through Hole   
Package / Case:   TO-220-3   
Packaging:   Tube   
Brand:   Vishay / Siliconix   
Fall Time:   210 ns   
Minimum Operating Temperature:   - 55 C   
Power Dissipation:   187 W   
Product Category:   P-Channel MOSFETs   
Rise Time:   225 ns   
Factory Pack Quantity:   50   
Typical Turn-Off Delay Time:   150 ns

------------------------------------------------------------
Vishay #SUP75P05-08-E3

Transistor Polarity:   P-Channel   
Drain-Source Breakdown Voltage:   30 V   
Gate-Source Breakdown Voltage:   +/- 20 V   
Continuous Drain Current:   75 A   
Rds On:   8 mOhms   
Configuration:   Single   
Maximum Operating Temperature:   + 175 C   
Mounting Style:   Through Hole   
Package / Case:   TO-220-3   
Packaging:   Tube   
Brand:   Vishay / Siliconix   
Fall Time:   175 ns   
Minimum Operating Temperature:   - 55 C   
Power Dissipation:   250 W   
Product Category:   P-Channel MOSFETs   
Rise Time:   140 ns   
Factory Pack Quantity:   50   
Typical Turn-Off Delay Time:   115 ns   
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: CraigHB on May 17, 2014, 02:06:03 PM
I like the Vishay FETS a lot, though it's getting harder to find through hole parts anymore.  At some point they're going to disappear altogether.

The specs like rise time and gate charge only become a consideration for high speed switching applications like for a power converter.  When using a part as an on/off switch or any other application that does not require high speed switching, you can ignore everything in the "dynamic" section of the specs.  That stuff indicates how fast the part can turn on and off.

If you're curious, rise time and fall time and just what they sound like, how long it takes for voltage to rise and fall when switching the transistor on and off.  These are very small amounts of time in the billionths of a second, but at higher frequencies they become considerable.  Specific conditions are defined for how these measurements are taken so in your application, you may or may not see those stated values, it's just to give you a quick idea.

Everything that has an "nC" dimension in the spec is a capacitance value in terms of charge.  Those come into play in driving the part on and off since it takes an amount of time and an amount of loading for current to overcome the capacitance at the junctions inside the transistor.  When driving a FET at high frequency, instantaneous peak currents on the gate can peak as high as an Amp or two.  Those peak currents are purely a function of the transistor's gate charge.  The capacitance values are what you use to determine the actual switching times in your specific application.
Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: Jasen on May 17, 2014, 02:34:03 PM
Craig, I'll never get a serious grip on this stuff, but I have been getting a better feeling for it from you, Break, Muma and some others here.


Thanx 



Title: Re: Side x Side Copper Bullet - V.V. w/ Digital Pot & Touch Switch
Post by: CraigHB on May 17, 2014, 03:00:56 PM
Well, you don't have to be an electrical engineer just to build a few mods.  I think it's always nice to have more understanding than required and I find it interesting anyway, always have.