• I tested it and I hear no sound through the headphone. when I take a meter to it and send your code to the espruino I receive 1.59V for a short duration, which should indicate at least the signal is going through. Im using pin A7 but tried it with B3, both give me the 1.59V when code is deployed. I will try with a few different speakers I shouldn't need an amp to power a single small two wire earphone speaker right?


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