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Topic: Electret microphone (Read 1 time) previous topic - next topic

Magician

Could be hardware failure, try to connect analog input directly to on board 3.3V and see what value you get.
Applying AC voltage to any arduino pins, even it coming from your PC sound card , is something Never DO. 

marian42

It reads 680. The A0 pin also works with potentiometers and all other projects.

What is the problem with connecting an AC signal to an analog pin?
Its the closest I ever came to making a VU meter ;)

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