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19594 Posts in 1255 Topics by 4910 Members - Latest Member: siksika January 23, 2017, 01:54:40 PM
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Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
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Author Topic: Tinkering with the OKL2-T20 20A 110W dc/dc converter...  (Read 117624 times)

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Offline SDaddy

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #400 on: January 02, 2017, 12:50:59 AM »
Its regulated and its a P-Fet not a mosfet. I know when building all my unregulated boxes, I would use a 15k resistor on the mosfet. I have seen several diagrams and see none with a 15k resistor on the p-fet.

True, but you don't even need the p-fet in that configuration.

Offline SDaddy

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #401 on: January 02, 2017, 11:01:21 AM »
Anyway, is your fire switch soldered?  You may have used too much heat on it if it is.

All your grounds at the 510? Any of them loose?

Did you test this outside the box before you installed it?

I don't see anything wrong with the diagram , although I would rather use a fuse than a p-fet

The only things that should be causing auto-fire may be:  bad soldering at key locations, or,   exposed areas contacting the box shorting it out, or over-heating the chip/parts while soldering.



Offline chopper71

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #402 on: January 02, 2017, 12:44:36 PM »
Yes the switch is soldered and it looks to be good. All grounds are done at the 510, none seem to be loose. Yes I'm testing this outside the box. Only thing that is in the box is the 510. Could the problem be the resistors I am using? The are the small SMD ones. I used for both the 20k and the 1.43k. I'm attaching a photo of the 1.43k and the 20k is about the same size. I do have those coming in that have the long legs on them. I appreciate your help SDADDY.

Offline SDaddy

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #403 on: January 02, 2017, 01:30:55 PM »
Using SMD version of the resistors is fine. Shouldn't be an issue as long as everything is wired properly. Again, you may have just burnt one.
You did attach one leg of the pot to the center leg, yes?

Desolder the firing switch, see if that does anything. After that, the only suggestion is replacing the resistors, which you are already on.


Offline chopper71

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #404 on: January 02, 2017, 01:59:28 PM »
Center leg on what? sorry not sure of what you are meaning.

Offline chopper71

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #405 on: January 02, 2017, 02:34:11 PM »
The 20k resistor is that what is suppose to keep it from auto firing?

Offline SDaddy

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #406 on: January 02, 2017, 03:33:10 PM »
The 20k resistor is that what is suppose to keep it from auto firing?

It's on the same circuit, so it could be your problem.

Offline chopper71

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Re: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
« Reply #407 on: January 09, 2017, 07:39:13 PM »
Got it all figured out. The seller sent me the Positive instead of the Negative board. He was shipped the wrongs one and didn't catch it. So he is making it right. I did figure how to wire it though and its working nice. Instead of running the 20k resistor to the vin from the on/off pad. Run it from the on/off pad to the Negative pad. Then run the on/off wire from the pad to the on/off switch. Then from there to the fire switch, then from there to the Positive on the battery sled. I got 3 of the + boards. So I'm keeping the one I got wired up and he is sending me 2 new - ones. I re done this diagram to show how I wired the OKL2-T20 P board.

« Last Edit: January 09, 2017, 07:48:05 PM by chopper71 »

Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: Tinkering with the OKL2-T20 20A 110W dc/dc converter...
 

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