AirHarp Lira and AirHarp USB

thingiverse

The AirHarp, an ultrasonic digital autoharp by Peter Alaric DeSimone, allows musicians to select chords using buttons and strum them invisibly in the air. As an open-source project, all related hardware, software, and documentation are freely available at http://www.airharp.com. Two AirHarp models exist: USB and Lira. The AirHarp USB uses Arduino Uno r2 for power and sends MIDI control messages via USB to various operating systems and mobile devices like Apple iPad. AirHarp Lira, built around the Lira microcontroller, is more cost-effective and runs on a single AA battery with a SparkFun voltage stepup circuit. Both versions have published designs, firmware source code, and 3D printed case files. PCBs, kits, and completed instruments are available at Lyratron, and building AirHarps for personal use is encouraged. The enclosures consist of two pieces held together by #4-40x1.25" screws. More information can be found on the project's websites.