Vapor Flask V3 DNA40 Clone thread

[TheBloke]

The Ryan V4 board that came out of my silver VF flashed "temperature protection". I'm guessing that some flasks maybe had firmware glitches and did not flash the TP message?

Oh right OK. When I first found my mod didn't say TP I also wondered if it was a bug rather than a feature. But it's persisted for a long time in new revisions, and even in new mods at 50W, so I'm now fairly sure it's a feature.

I certainly treat it as a feature. I don't like the TP message, in my view all it does is obscure information. It's could be good for newbies to the technology I guess, but otherwise it has no benefit; we can assume it's always protecting the temperature, and see how it does so by viewing the wattage changes - which the TP message actually makes harder to do.

It's even more annoying on the new Infinite chip because they have added a live resistance display which is very interesting and useful (for setting Nickel Purity / the coefficient value), but is often blocked by TP. That can be mitigated by setting the temp way too high so it never goes into TP.

Anyway it's clearly not related to a particular board revision, or at least not one they've numbered. Thanks.

 

[Mooch]

http://rohmfs.rohm.com/en/products/databook/datasheet/passive/resistor/chip_resistor/pml.pdf As close as I could come to ID

Is it the same "2L0" marked component as Thorpapa had burn out?
If yes, the datasheet you found is good for decoding that ID...2mOhm resistor. The resistors in the datasheet are different (rotated 90-degrees) than the ones on the board but the marking scheme is the same. Good find!

 

[AtmizrOpin]

Oh right OK. When I first found my mod didn't say TP I also wondered if it was a bug rather than a feature. But it's persisted for a long time in new revisions, and even in new mods at 50W, so I'm now fairly sure it's a feature.

I certainly treat it as a feature. I don't like the TP message, in my view all it does is obscure information. It's could be good for newbies to the technology I guess, but otherwise it has no benefit; we can assume it's always protecting the temperature, and see how it does so by viewing the wattage changes - which the TP message actually makes harder to do.

It's even more annoying on the new Infinite chip because they have added a live resistance display which is very interesting and useful (for setting Nickel Purity / the coefficient value), but is often blocked by TP. That can be mitigated by setting the temp way too high so it never goes into TP.

Anyway it's clearly not related to a particular board revision, or at least not one they've numbered. Thanks.

Ya the reason I got another Waidea flask was for non existing TP message I kept hearing the newer Waidea's had. But alas, as soon as I put batteries in it and fired it up that God awful TP message flashed. I like seeing what the chip is doing, not a message saying my temp is protected. That's what pushed me to buy and authentic DNA 40D. Ya I know the DNA will flash the same message but I like how the DNA uses the temp you set as more of a guideline than just racing you up to your set temp limit like the Rayn. At least that's been my experience with both chips.

 

[dwcraig1]

Is it the same "2L0" marked component as Thorpapa had burn out?
If yes, the datasheet you found is good for decoding that ID...2mOhm resistor. The resistors in the datasheet are different (rotated 90-degrees) than the ones on the board but the marking scheme is the same. Good find!

No idea as mine doesn't appear burnt, the unit just stopped working.
And to comment a bit farther I removed the screen from the non working Kx40 and tried to put it on an Evolv board without any success. Had I not removed the screen I surely would have jumped that 2L0 chip as I see it being used as a fuse. I am by know means an expert in this field. (or with women)

 

[Mooch]

I've always been amazed that these boards survive as well as they do without a lot more static discharge and spike/surge protection. Perhaps that's a cause? Merely conjecture though. A bit of probing around with a DMM and scope can sort it out but it's usually just worth it for the manufacturer to replace the board.

Is yours being replaced?

 

[AtmizrOpin]

No idea as mine doesn't appear burnt, the unit just stopped working.
And to comment a bit farther I removed the screen from the non working Kx40 and tried to put it on an Evolv board without any success. Had I not removed the screen I surely would have jumped that 2L0 chip as I see it being used as a fuse. I am by know means an expert in this field. (or with women)

Is the ribbon cable pin out different than that of an evolv's ribbon cable? Or was it a ....... trying to solder it to the board?

 

[Mooch]

No idea as mine doesn't appear burnt, the unit just stopped working.
And to comment a bit farther I removed the screen from the non working Kx40 and tried to put it on an Evolv board without any success. Had I not removed the screen I surely would have jumped that 2L0 chip as I see it being used as a fuse. I am by know means an expert in this field. (or with women)

Can't imagine a resistor being used as a fuse as their response times to various current overloads isn't known. There are surface mount fuses that can be used instead. But, on a board where every single penny being spent on parts is important, who knows. What are the letters/numbers on the black chip closest to the 2L0 resistor? That would help to identify what the resistor is being used for.

 

[dwcraig1]

Is the ribbon cable pin out different than that of an evolv's ribbon cable? Or was it a ******* trying to solder it to the board?

At the time I didn't know the procedure.

 

[dwcraig1]

Can't imagine a resistor being used as a fuse as their response times to various current overloads isn't known. There are surface mount fuses that can be used instead. But, on a board where every single penny being spent on parts is important, who knows. What are the letters/numbers on the black chip closest to the 2L0 resistor? That would help to identify what the resistor is being used for.

says "CFT" (mosfet?)
Marking of electronic components, SMD Codes CF, CF*, CF**, CF***, CF-, CF-**, CF-***, CF=***, CFE, CFQ, CFR, CFS, CFW. Datasheets 2SC3650, 2SD2150, BCX69-10, MAX6314US33D1-T, MMBZ4681-V, RT8010-25PQV, RT9014A-FMPQW, RT9161A-42PX, RT9169-12PVL, RT9293A-20GJ6, SY8101A, Si1988DH, bq24380, bq24381.

 

[Phone Guy]

I'm surprised that the RAYN board is $32. That's a good price for what it is. I think anyway.

Just saying, I've got a RAYN v4 board that works. Pulled from my flask and replaced with a evolv dna40. Maybe I should list it in the classifieds? I don't see myself reusing it in another mod.....

 

[Mooch]

says "CFT" (mosfet?)
Marking of electronic components, SMD Codes CF, CF*, CF**, CF***, CF-, CF-**, CF-***, CF=***, CFE, CFQ, CFR, CFS, CFW. Datasheets 2SC3650, 2SD2150, BCX69-10, MAX6314US33D1-T, MMBZ4681-V, RT8010-25PQV, RT9014A-FMPQW, RT9161A-42PX, RT9169-12PVL, RT9293A-20GJ6, SY8101A, Si1988DH, bq24380, bq24381.

How many pins?

 

[dwcraig1]

How many pins?

6 legs on the bug

 

[TheBloke]

I'm surprised that the RAYN board is $32. That's a good price for what it is. I think anyway.

Just saying, I've got a RAYN v4 board that works. Pulled from my flask and replaced with a evolv dna40. Maybe I should list it in the classifieds? I don't see myself reusing it in another mod.....

I agree it's a good price in and of itself, but I have to say I thought it was going to be cheaper. Just on the basis that $32 for a chip available in a $50 mod sounds like a lot to me. But I suppose the demand will be a lot lower on selling chips to end users so they're wanting more margin, and/or there's no competition (yet.)

 

[Mooch]

6 legs on the bug

All my CFT hits come up with the wrong number of pins. I would expect it to be a regulator/converter because that 2mOhm resistor value is typical. But, the case size is way too small for a converter that can drive those MOSFETs without overheating.

Or, it's an overcurrent detector and the chip is an op-amp. We'd have to start following the traces from that chip to know.

 

[Mooch]

Ahhhh...I just saw your Si1988 MOSFET hit for CF. Is there anything after the T?
That dual MOSFET seems to have a two-character trace code after CF.

 

[AtmizrOpin]

Ahhhh...I just saw your Si1988 MOSFET hit for CF. Is there anything after the T?
That dual MOSFET seems to have a two-character trace code after CF.

does this help.

 

[AtmizrOpin]

one more angle

 

[Mooch]

It does, thanks!
Doesn't get any clearer than that...CFT it is.

If two of the traces from the chip go under the 2L0 resistor and don't come out, I say it's either a regulator/converter or (less likely) overcurrent detector. Was there a good shot of the front of the board in this thread? Gotta' check. I wanted to see where the main regulator chip was located. It should be near the current sensing resistor and that has me thinking I was wrong about the CFT case size being too small to not overheat driving these FETs. I keep forgetting all the compromises the designers make when trying to stuff all those features/functionality into such a small space, sold for so few $$.

 

[AtmizrOpin]

abracadabra

 

[Mooch]

Thank you sir!