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Author Topic: Arduino Nano 3.0 chip hot, continuity between ground and +5V and cant upload  (Read 924 times)
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Hi All,

I'm working with a nano 3.0.

I had a project working on a breadboard and the build a permanent version on some perf board.

I'm powering the arduino with 12V.

When I plugged the nano into the new board and powered it up nothing happen. I tried to upload new code but I got the "avrdude: stk500_recv(): programmer is not responding" error.

I then noticed that the ATmega chip was really hot.

Upon further investigation I discovered that there now continuity between the +5V pin and ground pin (I assume it was not there before).

So it appears my new board is miss-wired and it fried the nano, however, I can't seem to find any mistakes on the board.

Could someone please suggest what might have caused this problem given the short and the heat, so I can try to find the problem on the board.

Cheers.

 
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How would we do that, without a photo of the board?
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Most likely you fried an output pin, with too much current out, which may have damaged an adjacent pin or two also.
Possibly power was reversed to the board also.
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I am having same issue. When I upload code with USB alone is no problem. But it always slowly heat up if I have NANO connected in any shield or board. It's not only one NANO, I tried several NANOs and they all the same.
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I found powering a Uno with 12V the voltage regulator would get hot if it (the Uno) was trying to drive a number of devices. This may be what is happening to you. The heat might be transferring to the processor chip. Try a lower voltage, preferably 7V but 9V, even, if you can't find a 7V supply.
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