VV mod help

[cyris69]

I've tried wiring up the madvapes vv version 2 board kit with no luck. I still have one regulator from that and a pot. I'd love to know how to finally get something to work


Stuff I Have:


Boards:
Dual General-Purpose IC PC Board - RadioShack.com
&
RadioShack® Grid-Style PC Board with 2200 Holes - RadioShack.com


Regulators:
http://www.zlgmcu.com/on/ds_ldo/LM350-D.pdf (would prefer to use this one)
&
madvapes NCP 630A 3 amp adjustable regulator


Resistors:
Lots of 10k 1/8watt
Can prob find other stuff from scraps on some old computer boards.


Potentiometers:
All three pin 50k, 100k micro, and one of those giant 50k knob style ones.




MISC:
Voltage readout display like that of the provari


I've searched all over the net and can not figure it out no guides, picture setups, nothing. I hate asking something I'm sure is easy or found online somewhere but not being able to read schematics or electrical symbols other than + or - is killing me...


I appreciate any help possible. Jollyriffic had sorta helped out but haven't heard from him on G+ in a while.

 

[cyris69]

Heck, even if someone could edit this picture in mspaint and post it with a legend or something and lines for stuff i'd be grateful

I'd use those as 4 separate boards cutting each in half

 

[TomCatt]

Check out donptal's Poorvari mod for using the LM350 for VV - http://www.e-cigarette-forum.com/forum/battery-mods/189320-my-poorvari-mod.html. You'll want to pick up a 1K pot (RS has 'em) and some resistors at RS too. I put this circuit in a AC adapter powered passthrough and was simple and easy to do.

 

[cyris69]

I think I love you! Finally some pictures. Curious, why does madvapes sell the vv board kit with a 50k pot not a 1k?

I can skip the LED right? just remove that res and the two wires?same with the on/off switch

 

[TomCatt]

Different regulators require different size pots. Just the way they are made, check out the data sheets for any regulators you want to use to determine what pot, resistors, capacitors, etc are needed.

Or be like me and wait until the Mod Elite post a how-to and copy off 'em

 

[TomCatt]

Yeah, you can skip the LED if you want to. I made the Poorvari circuit w/o an LED.

 

[cyris69]

well thank you very much for this post! I know what I will be doing tomorrow

 

[TomCatt]

Don't forget to post some pics!

 

[cyris69]

Quick question? Do the colors on the resistors have any significance? I'm going to an electronics store nearby and just didn't know if the color patterns made a difference.

 

[cyris69]

Also, at radioshack or kings electroincs I can not find 390 or 200 ohm resistors are there any other types that can be used?

 

[TomCatt]

The colors on a resistor indicate its resistance - i.e. 200 ohm would show BLACK-RED-RED if there's a fourth color band this gives the tolerance of the resistance - GOLD is +/- 5%; SILVER +/- 10% (http://www.dannyg.com/examples/res2/resistor.htm)

The resistors don't need to be exact, just try to get something as close as possible (available ).

 

[cyris69]

Again, thank you very much for helping me with this, I do greatly appreciate your quick and very helpful responses!

 

[cyris69]

well the most i can get it to do is 5.4v with freshly charged stacked 3.0v lifepo4 batts. on a lr 306 its works ok, but anything else its just doesn't give enough power to do anything before the chip wants to catch on fire its so hot. It does give off from 3.72-5.4v so i know the circuit works

Seems to me its time to get a provari

 

[TomCatt]

Here's some threads to check out. These use switching regulators (as opposed to linear regulators like the LM350) which don't generate as much heat. The heat that linear regulators put out is lost battery power. You can order the OKR regulator from Mouser and other places and the "Evercool" regulator can be ordered from Texas Instruments as a "free sample".

The last link is to a mod made with a module you can get on eBay. There are a number of different ones available on eBay; if you do buy any, CHECK the description for amps out. Some modules on eBay will output under 1 amp current which won't work for ecigs; you need a MINIMUM of 2 amps, preferably 3 amps. I just got a couple in this week to play with. These modules come with everything already on a board, just hook the battery leads (and switch) to one side and the atty connector to the other and you're ready to vape. The efficiency for these modules isn't real high; but better than linear regulators; this means that times between battery charges won't be as long as with the OKR or other chips.


http://www.e-cigarette-forum.com/fo...607-easy-okr-t-vv-mod.html?highlight=evercool

http://www.e-cigarette-forum.com/fo...-variable-voltage-mod.html?highlight=evercool


http://www.e-cigarette-forum.com/forum/battery-mods/220307-vvbox-vvpassthru.html

 

[cyris69]

 

[cyris69]

 

[cyris69]

Does this look right? I can get only 5.2v now from stacked 3v batts freshly charged then its pretty much impossible to use any atty/carto

 

[cyris69]

These are some further away photos. Taking these with my 100mm macro lens so if you need better photos let me know

 

[cyris69]

Here is a link to my flickr set for those images so you get full sized images for better viewing.
Ecig - a set on Flickr

 

[jhonutz]

for minivoltmeter you can buy from ebay 1s-6s LED Lipo Battery Voltage Checker Indicator Tester | eBay.

This is ok.