There are only so many blinking light patterns you can create with a microcontroller before you get bored. [Garrett] apparently felt that way and decided to build a music-driven LED display on some LED shades. The system has three main elements: a microphone, a preamp, and a 7-band spectrum analyzer chip. You can see the results in the video below.
In addition to the hardware design, [Garrett] also shows his technique for building the project on a printed circuit board. He also has an interesting trick to hold down solder stencils with spray glue. We’ve been big fans of these glasses since we first saw [Garrett] with them at Maker Faire a few years back. We still have a few pairs in stock in the Hackaday Store.