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Electret condenser microphone, LM386 amplification… does size matter?
I've built a motorcycle intercom, of which comprises of two amp units, one for the rider, one for the pillion. Both are powered by a 9v battery each, and the option (using a jumper) to enable boost.
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3
votes
4answers
3k views
Why is microphone + opAmp + Arduino circuit not working?
I followed the mic + op-Amp part of this schematic exactly using an Lm386 chip:
https://randomskk.net/projects/lightstrip/schematic.pdf
and sent the output from the op-amp into a pin on an Arduino ...
