I've been using my Arduino UNO for a while. I uploaded several codes and made many simple projects using them. Recently I connected my Arduino to a 12V 2A dc adapter for my project. Everything worked fine for about an hour then it stopped running code. I tried to run the program again and reset the …

The tx led of arduino uno is always on and the board can't be programmed(programmer not responding)

er_name_not_found October 5, 2021, 6:13pm 5

So you put 12V unregulated to your 5V pin?

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