USB mod with pneumatic switch

Status
Not open for further replies.

jdrancor

Full Member
ECF Veteran
May 7, 2008
65
8
reddingk.com
So.. I did the USB mod that was posted earlier by Bastage. It was great, and the power was excellent, never having to change batteries and all, great smoke, I was happy with it. But, the one thing I missed was having the cig in my mouth and puffing away with it while I worked. With the switch mod, I had to press on the switch to drag. I didn't like it, but I dealt with it because the smoke was much more reliable that with the batteries.

Then I got thinking. The batteries all have switches in them allready!! They have lovely pneumatic switches that are pretty dependable. SO. I used a dremel to cut apart an old battery, and soldered up the usb plug to the pneumatic switch. I even wired the LED light wired so that it lights up when I take a drag. The smoke is as plentiful as with the manual switch, without the hassle of 1) procuring a micro-switch and 2) pressing said switch each drag. It was easy. Honestly somebody with just a little tinkering experience could do it. I'll take pictures when I make version 2, and post a tutorial

After soldering it all up, I realized that I should have taken assembly photos.. but this is really just a proof of concept, not the best working device. But the concept is proven - the smoke is plentiful, the drags are easy, and the taste, probably because of the plentiful smoke, is good.

Improvements. Right now it's wired with solid copper telephone wire - its thin, but unfortunately it's really stiff. I'll be getting some super flexible headphone cord for Version 2, and some white shrink tubing to put around the .... part. Also I just ordered one of the MintyBoost USB power supply kits (a USB power supply with the form factor of an altoids gum tin) from the MAKE store, so pretty soon I'll have smokes on the go with plenty of power.

Here are some photos. In the disassembled shot, you can see the usb connector, the RN4801 (super mini.. on PureSmoker, it's called PeeWee) atomizer, and then there's a little tube of brown that I cut off of a cartridge.. this is just cosmetic. And then, a nice little bonus trick, the brown mouthpiece is from ecig.com penstyle.. it fits perfectly on the end of the rn4801 atomizer, and makes it easy to hold between one's teeth. It doesn't work with the cartridge, but I drip, so that doesn't matter

I like this very much, and I especially enjoy the small size - it's like a half-smoked ...., and it's so lightweight that it's effortless to keep in my teeth.

cig1.jpg



cig2.jpg



cig3.jpg
 
Last edited:

yo han

Super Member
ECF Veteran
Verified Member
Apr 9, 2008
796
396
the Dutch mountains
I really like what you guys are doing!
But wouldn't it be nice to take the ideas a bit further and also show a finished product as well? I don't mean this to bash your work at all, I'm just trying to encourage you to keep on going and trying to make it look good as well.
I've done a USB battery as well and after some mods it looks like this:
 

Attachments

  • USB.jpg
    USB.jpg
    17.9 KB · Views: 126
  • USB2.jpg
    USB2.jpg
    15.4 KB · Views: 132

yo han

Super Member
ECF Veteran
Verified Member
Apr 9, 2008
796
396
the Dutch mountains
Yo Han, that's beautiful! What kind of cord are you using? Version 2 is on hold until I find a good cable. I'm on the hunt for a thin and flexible wire with 2 leads in it.. basically one side of a thin headphone wire would be good. The thinner and more flexible the better.
Thanks. Finding a suitable cable was indeed the most difficult part :) I ended up ripping one from a USB toy. Normal cables always have too many wires which make them twice as thick and not suitable to use in these situations.
 

Bastage

Super Member
ECF Veteran
Oct 2, 2008
427
1
Houston, TX
Still working beautifully big guy ... Electrical Tape is kind of get used, but if it gets too junked up, will just strip it and retape!!! :thumb:


Cool. one thing you can do is get you some shrink tubing that's just a little bigger around than the ecig, cover the whole thing tape and all with shrink tubing and carefully heat it up with a blow dryer. It makes the surface like hard rubber.
 

Grumpysanta

Senior Member
ECF Veteran
Oct 8, 2008
224
5
66
Essex, England
Well my first external battery mod is done, it's not pretty so I wont insult you with pictures. I'm using 3 AA rechargeable batteries, real cheap, 3 for a pound so they are only 800mAH 1.2V batteries. The doner battery got busted up real bad as it's the first one to be taken apart so its a manual switch jobby. I took the liberty of measuring the current drawn and for future reference it's 900mA or 0.9A . anyway I'm in vaping heaven.

So some points to watch out for, 900mA is clearly higher than what a USB port is capable if delivering, especially most laptops. If you are going to mod for USB I suggest using a Current Limiting Circuit. I'm considering knocking out a circuit to do just that and protect the USB port from overload by short circuit. As and when I complete the circuit I'll post up for you. Anyone modding their e-cig for external power should make sure the cable they use is capable of taking at least 1 Amp .

Bastage : I think that explains why the retractable USB didn't work very well.

Anyway I hope this information helps.
 

jdrancor

Full Member
ECF Veteran
May 7, 2008
65
8
reddingk.com
No kidding. I went back to batteries for awhile and it was wiiiiimpy.

Unfortunately, my USB power source wasn't strong enough. I'm now sourcing a 4 AA holder to try instead of the 2 AA that I currently have. Bigger batteries are the future. The screwdriver is effective because of the big battery. Without the big battery, it's just a kissbox. A more functional kissbox, sure, but it's the big power that gives it it's kick.
 

Bastage

Super Member
ECF Veteran
Oct 2, 2008
427
1
Houston, TX
No kidding. I went back to batteries for awhile and it was wiiiiimpy.

Unfortunately, my USB power source wasn't strong enough. I'm now sourcing a 4 AA holder to try instead of the 2 AA that I currently have. Bigger batteries are the future. The screwdriver is effective because of the big battery. Without the big battery, it's just a kissbox. A more functional kissbox, sure, but it's the big power that gives it it's kick.

Sometimes USB hubs don't provide as much power to the atomizer, especially the cheaper ones. If you had that problem with a hub, try it directly to a PC or laptop. For battery power, 2 batteries isn't enough, and 4 is too much. You really need 3 batteries to make it work right.
 
Status
Not open for further replies.

Users who are viewing this thread