I would like to use a microphone (such as one you would plug into a laptop/PC) that when sound is detected, the microphone flashes or flickers a LED light. For power, I would like to use DC as AC would not be an option...
martin
Search on "Color Organ" circuit. You'll get lots of hits. Color organs were popular in the 60s.
You can use USB for power source as long you're careful on how many LED which the current is drawn.
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