Like subject all ready telling you, I blew up my 3th Nano every.

I mounted them on a perf board, soldered with 99% tin 1.0mm and a Flux, cleaned with flux remover, etc... When I then power them up through USB I have a short on pin 29 and 30 (Vin Gnd). And the board is ready to go directly in the poubelle (the garbage thing).

Second and third time, after soldering I scratched the space between both pins to make sure there is no connection. But... Yip again. Is this a common issue? Am I overseeing something?

Did my measurements with multimeter. No shorts.





  • 1
    which perfboard did you use? ... what is the picture supposed to show? ... you have provided zero information about what you did
    – jsotola
    Aug 30, 2021 at 16:46
  • 1
    have you tested all relevant pins for connections? I mean actually testing them (for example with a multimeter)
    – chrisl
    Aug 30, 2021 at 16:54
  • 1
    I took the time to hang the nano on my bench power to show you what is happening. What you're seeing here are pins 29 and 30 Vin and ground. drive.google.com/file/d/183kBK4hXRMbkuoGcrJJOLEInRQ5zVFIP/…
    – Joeri VA
    Aug 30, 2021 at 19:10
  • 1
    Use pin headers and check for the shorts before you'll insert board...
    – KIIV
    Aug 30, 2021 at 19:26
  • 2
    I don't know "welco". Is it an electronics solder or a plumber's solder? The same for the flux: is it electronic flux or plumber's flux?
    – Majenko
    Aug 31, 2021 at 12:34

1 Answer 1


If i am not wrong you have soldered nano directly to the perf board, which i don't recommend at all. You could try soldering a female strip pin on to the pref board and insert the nano board in the strip pin. This way you could easily remove/install the board easily as you wish. enter image description here

  • Since whoever down-voted this didn't bother to say, I'll offer a guess as to the reason. They appear to still be developing the question. And one of the comments suggests doing this exact thing, though, I think as a diagnostic measure rather than answer.
    – timemage
    Sep 4, 2021 at 13:20

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