Easy OKR-T VV mod

[Java_Az]

Thank you for the help. I put together the box mod a few days ago and it works great. The batteries charge fine without the PCB you posted WillyB, staying withing .02 volts of each other during charge. I use AW 18650 protected batteries though, so I'm not too worried and I will be swapping their position in the box every few day to make sure they get an equal voltage during discharge.

I have one last question for the gurus in this thread - since the converter is ON when pin 5 is open, and OFF when it is connected to ground, can I use a normally closed switch connected to pin 5 and ground to keep the converter off? Pushing it would break the circuit and turn the converter on correct? I am trying to figure out ways to expand my switch options, as 3A+ switches are too large for my next project with this awesome OKR regulator - a smaller 14500 box I have in mind. Thanks again.

edit-
Looking over the data sheet again, it seems applying a voltage upto Vin to pin 5 is also acceptable. Would it be possible to have pin 5 connected to ground, then have a normally open switch running from the battery through the switch to pin 5?

Yeah there would be no need to add another protection board if your batteries are already protected. Glad to see that you got it figured out and working.

As for running the OKR-T with a NO switch it for sure can be wired like that. There is a thread around here somewhere that CapeCad started that has a schematic on how to wire it up like that. You just need to add a resistor 1 or 2 k i believe going to ground . I will see if i can find the thread and post a link in here.

EDIT: make that a 100k to ground , here is a link to the thread. The last PDF in the first post is what you want to look at http://www.e-cigarette-forum.com/forum/battery-mods/152392-coolgate-variable-voltage-mod.html

 

[meatsneakers]

Thank you Java for finding that link. I be sure to post my next mod with the OKR, it's a great regulator.

 

[wazzup592]

This circuit looks easy enough. Just wondering how large that regulator is and What solder should I use

 

[bstedh]

This circuit looks easy enough. Just wondering how large that regulator is and What solder should I use

I prefer to use silver bearing solder with rosin core. I use the real thin stuff so I have better control of how much I am applying. The roll I have has been laying around for several years so I don't remember where I got it from but RS should be good place to pick it up.

The dimensions should be in the data sheet. I will double check. I am out of town so I can't measure mine but I think it is about 14mm wide.

0.41" L x 0.30" W x 0.65" H (10.4mm x 7.6mm x 16.5mm)

 

[wazzup592]

Nice that's not a bad size. I'm excited for this

 

[Rockproof]

bstedh,

Thought you might like to see the latest mod I put your suggested chip set in. This is the second box I have installed the ORK-T in and, as expected, it vapes 1.25 and 1.5ohm LR DC's like a champ. My sincere thanks for your helpful post and great illustration

 

[bstedh]

Nice MOD... I have been searching for a 2X 18650 case similar to that. I may have to try and dust off my non existent wood working skills and make my own. I have some C boxes coming from madvapes for now but don't want plastic for the long haul.

 

[wazzup592]

im ordering everything now. Is this Horn style switch -- Black switch ok. It claims 5amps at 12 volts. Also I just now need a master switch to keep from pocket firing and im good

 

[Java_Az]

im ordering everything now. Is this Horn style switch -- Black switch ok. It claims 5amps at 12 volts. Also I just now need a master switch to keep from pocket firing and im good

12volts 5 amps is pretty stout. If you converted it down to 6 volts it would be 10 amps. At 8 volts it would be 7.6 amps i believe. To late to be doing math but it should be good for vaping.

 

[Rockproof]

Thanks bstedh,

As you can see from the pic, the box and most of the guts are made by Hog here on ECF. He has a true talent in woodworking. I just built and wired in the ORK-T which, like my first (going on 2 months in use), is firing flawlessly.

Thanks again.

 

[meatsneakers]

As for running the OKR-T with a NO switch it for sure can be wired like that. There is a thread around here somewhere that CapeCad started that has a schematic on how to wire it up like that. You just need to add a resistor 1 or 2 k i believe going to ground . I will see if i can find the thread and post a link in here.

EDIT: make that a 100k to ground , here is a link to the thread. The last PDF in the first post is what you want to look at http://www.e-cigarette-forum.com/forum/battery-mods/152392-coolgate-variable-voltage-mod.html

I've been putting together my 2nd OKR mod with the schematic from the Colgate mod, but I can't seem to get the NO switch to work. The OKR won't turn off with the 100k resistor between ON/OFF and ground. All I have around are some 330 ohm resistors and it shuts off with the pins connected, but it fried my tactile switch.

Does a 10k sound more appropriate? That would give me .84 ma across the switch, which is more inline with the 1 ma specified in the data sheet. With 100k it would be .08 ma and that doesn't seem right.

 

[Java_Az]

Only time i ran that setup was on the Ti ptr08100w and if i remember right it worked out to be a 10k resistor. I didnt notice till now but that schematic is for the OKR 3 amp module. I believe the 3 amp has different specs on the Inhibit pin, which might be why it is not working for you. I would try the 10k and see if it will work. I will have a look at the data sheets tomorrow and see what the exact difference is on the inhibit pins.

 

[mamu]

If you're going to use pin 1 of this 6A version of the OKR module, then you need a 10K ohm resistor across pins 1 and 3. Anything higher than 10K and the module will always fire the atty even without the atty switch pressed (i.e., the converter is always on).

The datasheet calls for a 47K but after experimenting with that I found that a 10K is what turns the module off.

 

[meatsneakers]

Thank you Java and Mamu, I used a 10k and it now works correctly.

 

[bstedh]

Mamu, You should add links to a couple of your OKR projects. I remember seeing one or two of them but can't find them now.

 

[meatsneakers]

I finished up my second mod using the OKR and it came out pretty good. The wiring is a bit of a mess because all I had was 20ga but it works great and incorporates everything I need in a PV:

• Tough
• Juice feeder
• In-the-box charging
• VV
• Compact

I didn't want to deal with unscrewing for every battery change, so I use 2 protected 14650's with an external dual li-ion charger. The juice is refilled with a syringe through the atty connector.

Some pics:

I de-soldered the pins so I could just get the wires directly to the pads to squeeze it into this spot:

A tactile switch, thanks to Java and Mamu's help I was able to use this to trigger pin 5, should last a long while as it's carrying very little current:

Next to an 18650 for size reference:

Next to another OKR mod I made using 2 18650's:

 

[Harrygrowth]

Is the original page #1 schematic and parts list still valid after 14 pages of discussion? Not understanding alot of the electrical jargon so if there were substitutions or upgrades to the original that would be cool.

 

[Java_Az]

Is the original page #1 schematic and parts list still valid after 14 pages of discussion? Not understanding alot of the electrical jargon so if there were substitutions or upgrades to the original that would be cool.

Yeah first post is still valid , it will vape quite nicely.

On another note digikey dropped the price of the 10 amp module to 10 bucks even. Figures right after i bought one last week. http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=OKR-T%2F10-W12-C

 

[mamu]

Mamu, You should add links to a couple of your OKR projects. I remember seeing one or two of them but can't find them now.

I made 3 different types of mods with this OKR module. 1, dual 18650 mod and 2, dual 14500 mods.

I'm very impressed with how well the OKR is holding up - it totally makes for a great vv vape with long batt life.

Thanks again to you and CapeCad for sharing!

 

[asdaq]

Lovely knobs, Mamu.