Easy OKR-T VV mod

[bstedh]

I thought I would share my research and post an easy VV that just about anyone who can use a soldering iron could put together.

A lot of this came from the evercool thread and work on my own VV. http://www.e-cigarette-forum.com/forum/battery-mods/114901-evercool-variable-voltage-mod.html

I did not include a box or other body as you can put this into whatever type of mod you can cram it into...

You can also add an LED or other bells and whistles but I wanted to keep this as simple and strait forward as possible.

Edit: You can also use any 3.7V batteries to fit the mod body that you are looking at. The higher the mah the better. The 14500's I used where a compromise due to the body I had to work with.

Any guru's out there please chime in with simple suggestions or modifications or anything I may have missed. Especially with regard to the switch.

Here is a link to the one I put together. I have cleaned up the wiring from what I posted but it gives you a good Idea of a finished product from this idea.
http://www.e-cigarette-forum.com/forum/modders-forum/185242-vv-weller-bp645.html

Parts List
Some parts you may already have or you can substitute with parts of your choice.

--Digi Key--

OKR-T Regulator - I personally used the 6amp with great success.
http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=OKR-T&x=0&y=0
OKR-T/3-W12-C $6.39 - 3A
OKR-T/6-W12-C $9.47 - 6A
OKR-T/10-W12-C $11.48 - 10A

3352T-201LF-ND Variable resistor $1.58
http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=3352T-201LF-ND&x=0&y=0

PPC200ZCT-ND 200 ohm resistor $.26
Digi-Key - PPC200ZCT-ND (Manufacturer - MRS25000C2000FRP00)

525PB-ND switch 2A @ 14VDC $2.76 - I have not used this switch and you may want one of your choosing.
http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=525PB-ND&x=0&y=0

Edit: Spec sheet for switch http://media.digikey.com/pdf/Data%20Sheets/Judco%20PDFs/40-4463-00.pdf

--MadVapes--

Shorty 510 Extension and Connector $6.99
I personally like this as it has a nut to help secure it to the mod body without glue or epoxy. However you can use a cheaper connector. Which ever connector you use I recomend removing the center pin and insulator for soldering so as not to melt the insulator.
https://www.madvapes.com/Shorty-510-Extension-and-Connector_p_2987.html

Ultrafire Protected 14500 Battery, 900 mAH $4.79
https://www.madvapes.com/Ultrafire-Protected-14500-Battery-900-mAH_p_2039.html

TrustFire TR-001 Lithium Ion Battery Charger $9.99
https://www.madvapes.com/TrustFire-TR-001-Lithium-Ion-Battery-Charger_p_2474.html

Mini Pre cut Interconnect Circuit Board $0.99
This is not necessary but it would make connecting to your regulator and resistors much easier. Just cut it down to the size you need. One piece for the regulator and one for the variable resistor. this will also help to mount them in your mod body.
https://www.madvapes.com/Mini-Pre-cut-Interconnect-Circuit-Board_p_2567.html

 

[breaktru]

I can't believe that Madvapes doubled their price for the Shorty 510 Extension and Connector $6.99. I paid $3 and change. Must have been the first lot.
BTW, good work bstedh. I know you don't like caps but I tested my single 14500 with a 4050c and the caps mad a big difference on battery life (twice the life). This set up may not need them though.

 

[Gummy Bear]

I'm testing a .... naked 4050 on an 18650 now.

 

[breaktru]

I'm testing a .... naked 4050 on an 18650 now.

Please Gummy, no .... naked pictures

 

[breaktru]

The 18650 with no caps may not show any if no difference but the 14500 needs all the help it can get. "IMHO"

 

[asdaq]

Agreed. With the 18650 it may last 15mins shorter with no caps, and just stress the booster some extra.

 

[Gummy Bear]

The 18650 with no caps may not show any if no difference but the 14500 needs all the help it can get. "IMHO"

Your humble opinion is gospel around here bro.

 

[breaktru]

Agreed. With the 18650 it may last 15mins shorter with no caps, and just stress the booster some extra.

That sound right about the stress on the booster. I had to fire the button in bursts to get the full effect.

 

[breaktru]

Your humble opinion is gospel around here bro.

Stop... my head is swelling

 

[bstedh]

I thought about buffering the batteries with a capacitor but with two batteries in series its not really necessary. This setup will last all day running dual coil cartos. Also, I had enough wires crammed into my mod so I didn't want to stuff more =]

 

[breaktru]

All day is good

 

[bstedh]

I take that back... It just quit on me and I gotta replace the batts. Definitely recommend having 4 batts on hand to switch out while charging.
3/4 of a day using 1.25ohm dual coils.
3/4 to 1 day using 1.5ohm dual coils.
Little over a day using 2.0ohm carto
guessing a day and a half using standard 2.7ohm carto

Also I vape pretty heavily. Pretty much non stop all day. A less heavy vaper will probably get a lot better life out of it. =]

Of course the higher ohm cartos I use higher volatage which reduces the vape time some =]

 

[Gummy Bear]

That's not bad time at all.
I go through two 18650s per day at 4.5 volts and a 3.2 ohm CE2. That was with the other chip that had caps. and I still don't know about this one yet.

 

[breaktru]

I wish the 14500's where more than 900mah.

Like I had said in another post, I get 6 1/2 to 7 1/2 hours of vape time with one 14500, 900mah on a 04050c and caps. Before the caps I got 4 hours.

 

[bstedh]

The nice thing about this setup is that you can use any 3.7V batteries your mod will fit.
The weller body I have is only AA size so I was limited to the 14500 batteries. I have already started looking for something to mod with bigger batteries. My ultimate goal is to have a hand size mod that will run all week without touching anything. Including a juice feeder with 30ml bottle. =] (did I say hand held, I must have meant man portable backpack sized.)

 

[VpnDrgn]

Great diagram, but I have 2 questions.

- This is a regulator, not a booster, right? You have to have 2 batts in series?

- Every pot I have seen has 3 legs, but every diagram I have seen with a separate pot wired in, only uses 2 legs.
What is the third leg for?

 

[bstedh]

Great diagram, but I have 2 questions.

- This is a regulator, not a booster, right? You have to have 2 batts in series?

- Every pot I have seen has 3 legs, but every diagram I have seen with a separate pot wired in, only uses 2 legs.
What is the third leg for?

This is a variable switching regulator with two batteries in series.

The 3 legs are so you can decide which direction of turn does what. If you use the left two the resistance increases with clockwise rotation. If you use the right two the resistance decreases with clockwise rotation. If you use the outer two you get the max resistance without variance. Of course this is dependent on which way you are looking at the device =]

 

[asdaq]

And if you connect the unused pin to the center you prevent the possibility of an open circuit if the pot fails. It will then default to the max resistance.

Vpn, you asked somewhere about the genisis being a juice hog. Not sure which thread, but for me, I haven't noticed a difference in 6 months. I'm still at 2ml/day but the quality and quantity of vapor has increased.

 

[VpnDrgn]

The 3 legs are so you can decide which direction of turn does what. If you use the left two the resistance increases with clockwise rotation. If you use the right two the resistance decreases with clockwise rotation. If you use the outer two you get the max resistance without variance. Of course this is dependent on which way you are looking at the device =]

OK - More resistance means less voltage?
Why would you want max resistance with no variance?
That means not adjustable right? Why have a pot at all?
Why is there a resistor on the pot? Does that change the range?

 

[VpnDrgn]

Vpn, you asked somewhere about the genisis being a juice hog. Not sure which thread, but for me, I haven't noticed a difference in 6 months. I'm still at 2ml/day but the quality and quantity of vapor has increased.

Thanks Asdaq, I thought I remembered somebody saying it used more juice, somewhere in the labyrinth of Raidy's post.