Posted in Arduino Hacks Tagged arduino pro mini, audio bug, bug, electret microphone, microsd Ambilight For Your Piano (Hero) December 26, 2014 by Mike Szczys 7 Comments ...

Maybe you can see where this is going: If you can make a microphone using electret materials, and there are electret fibers in an N95 mask, you can use a mask to make a microphone. Here’s what I ...

West, now a professor of electrical and computer engineering at Johns Hopkins University, invented the electret microphone in the early 1960s. Today, ...