You don't want to use a 200Ω anyway, that's the wrong value. The datasheet, which you should read and I'm sure a few post have noted that.
220 - 240Ω should be fine.
Easy OKR-T VV mod
- Thread starter bstedh
- Start date
- th_trl_thread_readers 0
- Status
220 - 240Ω should be fine.
YUzazaMY, Your 200 ohm 1/4, 1/6 Watt will be OK to use connected to pin 5 which sets voltage. There is no, or very tiny amount of current that flows through the resistor and trim pot connected at Pin 5, then to ground. Low Watt rated Resistors here are OK!
Yes! That Variable Resistor will work. The 10% Tolerance in this situation just means it's more accurate than the 20%. So Use it!
Ground---->200 ohm--->200 ohm Trimmer pot--->Pin 5
Your total range will be 200 - 400 ohms on pin 5 with a output Voltage range of 3.54V - 6.5V
Resistance=(1.182/(Voltage-0.591))*1000
400=(1.182/(3.54 - 0.591))*1000
200=(1.182/(6.5 - 0.591))*1000
What I would recommended tho, is adding a 10 or 20 Ohm resistor in that series or find a 220 Ohm resistor. This will bring your Highest voltage setting down to under 2X the batteries lowest charge of 3.1-3.2V. But if you are never going to vape at the fullest voltage when the batteries are getting low then I wouldn't worry about it. Or get your mod up and running and swap out or add some resistance when you get the right ones.
You could do this...
Ground--->220 ohm--->200 ohm Trimmer pot--->Pin 5
or
Ground--->20 ohm--->200 ohm--->200 ohm Trimmer pot--->Pin 5
or
Ground--->10 ohm--->10ohm--->200 ohm--->200 ohm Trimmer pot--->Pin 5
or
Ground--->10 ohm--->200 ohm--->200 ohm Trimmer pot--->Pin 5
Resistance=(1.182/(Voltage-0.591))*1000
210=(1.182/(6.2 - 0.591))*1000
220=(1.182/(5.95 - 0.591))*1000
410=(1.182/(3.54 - 0.591))*1000
420=(1.182/(3.4 - 0.591))*1000
220 Ohm 1/8 watt Tolerance +/- 1% <-Good cheap place with fast shipping!
Last edited:
Can this indicator be wired and use all 6 different measurements? or it is limit to use only 1 function?
If it can be done with any additional parts like a selection switch can anyone draw a simple scematic how to wired it for a newbies like me to understand.
I made this mod over the Thanksgiving holiday, it was my first and I would say that I am impressed with the original design. The only thing I upgraded was the switch. I would recommend a 4AA box though as it is quite difficult to put all the components into a 3AA. Voltage range is 3.5 to 6.5, however since I use dual coil carts I don't usually have it above 4.7V. Many thanks to the OP for this inexpensive VV mod design that I believe anyone could build.
I found a sweet box that feels better than the stack of graham crackers I was using before.
2x14500's fit side by side perfectly! Battery contacts salvaged from a Hitachi TV remote. Case cost $1.39 new, using halves from two boxes to eliminate screw holes. I have 2 clear white LED's to add downward pointing internal theater lighting. Should look good shining through the clear blue. Still have to source LED on/off toggle and a smaller trim pot for light dimming. Variable voltage will be accessed internally only, magnetic clasps to hold shell.
Everything is gong to fit nicely!
With some tweaking of components on version 2, there's room for a bottom mounted digital voltage display. Don't like this blue ego cone and Red button tho, lol
Next to a eGo 1000Mah USB passthrough
2x14500's fit side by side perfectly! Battery contacts salvaged from a Hitachi TV remote. Case cost $1.39 new, using halves from two boxes to eliminate screw holes. I have 2 clear white LED's to add downward pointing internal theater lighting. Should look good shining through the clear blue. Still have to source LED on/off toggle and a smaller trim pot for light dimming. Variable voltage will be accessed internally only, magnetic clasps to hold shell.
Everything is gong to fit nicely!
With some tweaking of components on version 2, there's room for a bottom mounted digital voltage display. Don't like this blue ego cone and Red button tho, lol
Next to a eGo 1000Mah USB passthrough
Last edited:
I found a sweet box that feels better than the stack of graham crackers I was using before.
2x14500's fit side by side perfectly! Battery contacts salvaged from a Hitachi TV remote. Case cost $1.39 new, using halves from two boxes to eliminate screw holes. I have 2 clear white LED's to add downward pointing internal theater lighting. Should look good shining through the clear blue. Still have to source LED on/off toggle and a smaller trim pot for light dimming. Variable voltage will be accessed internally only, magnetic clasps to hold shell.
Everything is gong to fit nicely!
With some tweaking of components on version 2, there's room for a bottom mounted digital voltage display. Don't like this blue ego cone and Red button tho, lol
Next to a eGo 1000Mah USB passthrough
I *LIKE* that.....a lot. Looks great and it's SMALL !
Hi All,
I have breadboarded the OKR-T6 with 2x18650 batteries exactly as suggested in this thread and wanted to install 6v2 zener diode to the on/off pin for safety. Without a zener everything runs perfectly but with this diode I have had some problems.
First, for my setup the 10kOhm pull down resistor seams to be too large. I have measured the voltage at the on/off pin and it shows about 0.6V on the stand by! With 1kOhm resistor it drops to about 70mV. When I use the zener and 10k res. the zener is not switching off the OKR at all when I decrease the input voltage below the zener rating. However with 1k it is working properly! Everything tested with the laboratory power supply 5A rated.
I am a bit confused here. Does the 5v6 zener makes so big difference compare to the 6v2 despite the different voltage rating?
I have breadboarded the OKR-T6 with 2x18650 batteries exactly as suggested in this thread and wanted to install 6v2 zener diode to the on/off pin for safety. Without a zener everything runs perfectly but with this diode I have had some problems.
First, for my setup the 10kOhm pull down resistor seams to be too large. I have measured the voltage at the on/off pin and it shows about 0.6V on the stand by! With 1kOhm resistor it drops to about 70mV. When I use the zener and 10k res. the zener is not switching off the OKR at all when I decrease the input voltage below the zener rating. However with 1k it is working properly! Everything tested with the laboratory power supply 5A rated.
I am a bit confused here. Does the 5v6 zener makes so big difference compare to the 6v2 despite the different voltage rating?
I used these
Digi-Key - 568-7376-1-ND (Manufacturer - PLVA665A,215) (a PITA to solder, btw)
Digi-Key - 811-2179-ND (Manufacturer - OKR-T/6-W12-C)
and ended up with a 10k resistor as the highest res that would function properly.
http://www.e-cigarette-forum.com/forum/battery-mods/193434-low-voltage-cut-out-5.html#post3476281
I found a sweet box that feels better than the stack of graham crackers I was using before.
2x14500's fit side by side perfectly! Battery contacts salvaged from a Hitachi TV remote. Case cost $1.39 new, using halves from two boxes to eliminate screw holes. --snipped-- Everything is gong to fit nicely!
What is the box you used (or what kind of box is it), and where did you find it?? That looks like something I'd like.
After making 5 wood mods for friends and family this holiday, I finally got to sit down and fashion one for myself. This is an OKR-6 in a case made from Walnut and Birdseye Maple. Instead of a push switch, I used a momentary rocker switch (satisfying as hell to push 
) and for the juice feeder, I made a stainless pin that pushes on the bottle. It works much better than a large hole that you use your finger through - a wet atty for me is 3 complete pushes.
) and for the juice feeder, I made a stainless pin that pushes on the bottle. It works much better than a large hole that you use your finger through - a wet atty for me is 3 complete pushes.
Beautiful. The two tone wood is complemented nicely by two tone metal. That switch is great too, and a fresh idea. I really like new things in switches.
I havent seen anyone use capacitors with the okr. The data sheet for the okr shows a schematic with capacitors. Is it ok to not use them? if so, why dont you have to use them?
sorry for a dumb question, but im still a little new to modding
sorry for a dumb question, but im still a little new to modding
Matadorx, they are in the specs for a reason, and some do use them. Mamu has them in her mods and there is a discussion in the 1st 15 posts of this very thread that explains it fairly fully. It's easier on the batteries and the okr, the atty doesn't care though.
Thanks for the compliments guys. I thought I'd be saving money since switching to e-cigs, but now I keep buying hand planes and wood stock instead 
It's this guy: Digi-Key - CT6EP201-ND (Manufacturer - CT6EP201)
It offers the finest adjustment (200 ohms) without being a multi-turn trimmer. I was able to solder it directly onto the OKR board so it becomes a self contained module.
It offers the finest adjustment (200 ohms) without being a multi-turn trimmer. I was able to solder it directly onto the OKR board so it becomes a self contained module.
this looks like a useful pot, one of the neat ones, there are only a handful of practical choices after all.
- Status
Similar threads
- Locked
