Upright Laser Harp

HACKADAY: https://hackaday.io/project/167163-upright-laser-harp INSTRUCTABLES: https://www.instructables.com/id/Upright-Laser-Harp/ 0:00 A song too long, but... lasers 3:00 System intro 4:19 Open up the bottom 5:14 Mechanical design 5:51 Mirror mount assembly 7:03 Laser mount 10:50 Photodetector mount 12:21 Assembling the laser mounts 14:00 Stack up each layer 14:40 Instrument wheel 17:40 Finishing the assembly Laser harps are musical devices with laser beam "strings." When the beam is blocked, a note is played by the instrument. Usually laser harps have the beams travel vertically in the shape of a fan or vertical lines. In this project, I built a laser harp with stacked laser beams that propagate horizontally. The beams reflect off mirrors to form square shaped beam paths. Instead of a MIDI output like my previous laser harp, this device has built-in MIDI player so the output is an audio signal. This means the device does not have to be connected to a computer or MIDI player (e.g. keyboard) to play sound. Both built-in speakers an audio output jack are available for playing music.