Laser Harp

A laser harp is a device that uses a laser beam shone onto a mirror attached to a stepper motor, attached to an Arduino which is attached to a computer via a MIDI jack. The laser is projected onto the mirror and the stepper motor moves fast enough such that multiple laser beams appear to appear simultaneously. Whenever a laser beam is "cut", such as with a hand, the intensity of the beam increases, which is registered by a light detecting resistor. The resistor then associates the increased intensity of light with a position on the stepper motor (which is how it is able to differentiate between different beams). This information is then relayed back to the computer via the MIDI jack, which tells the computer to produce a note associated with the specific position of the stepper motor.

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