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FWeinb
@FWeinb
Just used another one. got 1V now.
Me No Dev
@me-no-dev
what do you get on VIN?
FWeinb
@FWeinb
1,75V
Me No Dev
@me-no-dev
that also does not sound right
power goes like this
USB -> Diode -> VIN -> LDO -> 3.3V
maybe the diode is gone
it's the little black SMD part next to the VIN pin
you can check with the good multimeter between GND and both of it's pins
FWeinb
@FWeinb
No. That one is wrong
Me No Dev
@me-no-dev
oh ok...
let me look
FWeinb
@FWeinb
That one is wrong.
Me No Dev
@me-no-dev
can not say for sure on this one... I have the Amica one and looks much different
yours seems to have no protection
so USB 5V, LDO and VIN are tied together
FWeinb
@FWeinb
But it is just strange that I don't get 5V on VIN anymore.
Me No Dev
@me-no-dev
if you have something that is introducing a low resistance between the pins, then it could cause such drop
did you actually see smoke?
FWeinb
@FWeinb
Yes saw a little bit of smoke.
Me No Dev
@me-no-dev
can you tell what gave it? it should be visible
FWeinb
@FWeinb
That is the problem I can't find anything on the board. Thats way I think it was the esp.
Me No Dev
@me-no-dev
the esp is well shielded :) i doubt it will let any smoke
any chance you take a high res picture and post it here?
FWeinb
@FWeinb
Sure, just a sec.
Me No Dev
@me-no-dev
there is one small diode on the board but I can not tell how it's connected by just looking at the image
if it's used to pass the power and too high of a current have passed through
it could have gone dead
Martin Ayotte
@martinayotte
I don't see any diode there, at least from the picture. It could be on the bottom side. (I hope your PC USB isn't damage too)
FWeinb
@FWeinb
USB is fine.
Just stupid to not change the multimeter...
There is nothing on the bottom.
Me No Dev
@me-no-dev
@martinayotte right next to the LED (on the left)
Martin Ayotte
@martinayotte
Maybe the VReg itself ... (For example, on the Wemos, there is no diode, so it would be the RT9013 that will come into smoke)
Me No Dev
@me-no-dev
but he shorted the incomming power
not the 3.3 and GND
so the LDO should be fine
Martin Ayotte
@martinayotte
Ah ! ... so, you mean the small black near the crystal ? could be it
I've done the quite the same mistake with some STM32 MapleMini, I've purchased such diodes 50 pieces for $2
In mean time getting spare part, simple wire could be placed there, as long as you don't do same mistake, for the health of you PC USB ;-)
FWeinb
@FWeinb
Yeah. I will not be a little bit more carefull.
Michael Miller
@Makuna
@mozgy yeah, I wish we could tag a rating system on that list. I wish Arduino would add a rating system to the Library and Board Manager.
tzapu
@tzapu
or at least the github stars each package has, already there as information ..
Michael Miller
@Makuna
@FWeinb @me-no-dev Everytime I tried hot air, I ruined the module, as pieces under that shield would "slide" on the slightest movement. I wish you good luck as I didn't have it and figured it was just cheaper to replace it.
Me No Dev
@me-no-dev
@Makuna I have done it :) patience helps
decapped many modules as well without any damage to the internals
FWeinb
@FWeinb
The good thing is that these esps are as cheap as it gets so no worry. Thanks for the help!
Martin Ayotte
@martinayotte
@FWeinb , did you tried to replace temporarily the diode with a simple wire ?
Keith Andrew Hill
@vic10us
Looks like there is a little damage on the left J3Y