Sometimes, whether we like it or not, ordering PCBs results in extra PCBs lying around, either because of board house minimums, mistakes on either end, or both. What’s to be done with these boards? If ...

[Sam Kent] and friends built a sound-reactive LED display as part of the Leeds (UK) Digital Festival and exhibited it at Hyde Park Book Club. The installation consists of a grid of 25 tubes, each one ...

As our audio-reactive projects increase in sophistication, we may decide to replace a simple MEMS microphone plus amplifier with one that offers automatic gain control. This is a follow-on to my ...

Programmer Mike Tsao has devised a clever method to program an Arduino board using sound. Programmer Mike Tsao has devised a clever method to program an Arduino board using sound. T.C. Sottek is ...