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12:39
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Q: Arduino Nano - Strange problems

Black ThunderUpdate: The arduino works only when I connect 3.3v to reset pin. And I successfully uploaded a sketch but it stops when I disconnect 3.3v and rst. I bought a new arduino nano V3 clone. Till now, I have been facing very strange problems with it: The pre-uploaded blinking sketch works for a ...

arduino-nano sketch
Black Thunder
Black Thunder
@Erlkoenig Same happens when powered with the 5V arduino power supply.
@Erlkoenig Which pins are the crystal pins?
@GMc I don't have any other computer, but as I have already mentioned I tried the same sketch with another nano and it worked
I don't have any oscilloscope
Juraj
Juraj
did you solder the headers?
Black Thunder
Black Thunder
@Juraj Yeah, I soldered them.
Juraj
Juraj
check the soldering for shorts
Black Thunder
Black Thunder
Nope, Its perfectly soldered
@Juraj Check the update
Juraj
Juraj
12:39
you have some week solder connection between reset and ground pin. it pulls the reset down holding the MCU in reset.
Black Thunder
Black Thunder
So should I resolder?
Juraj
Juraj
take a magnifying glass and check it. maybe it only needs a little cleaning. check both reset pins
and check the ICSP header too
Black Thunder
Black Thunder
@Juraj I resoldered and cleaned it. It worked constantly for like a min but its now in the same state again.
After that, if I take a break for a min, it starts to work again for like a min
@Juraj Does the ICSP has to do something with it?
Juraj
Juraj
13:06
on ICSP is Gnd next to Reset too. you still connect the 3.3 V to reset?
Black Thunder
Black Thunder
It works for a min without connecting the 3.3v to reset
Juraj
Juraj
13:19
I suspect some other short causes heating and shutdown of the voltage regulator.
Black Thunder
Black Thunder
13:36
@Juraj Connecting 3.3v to reset also makes it run only for a min
I will resolder the ICSP pins too and will see what happens
It might be that flux which I use
It might be the cause of shorts
I will try remove that
Juraj
Juraj
13:55
don't solder the ICSP pins if you don't need them
 
4 hours later…
Black Thunder
Black Thunder
18:22
@Juraj I already had soldered the ICSP pins
Though resoldering those pins didn't help
 
1 hour later…
Black Thunder
Black Thunder
19:37
You might want to check the video youtu.be/MMiZEQKPJMM
Black Thunder
Black Thunder
20:05
And don't forget that the arduino in the video is in the state which I am facing

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