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Hi,

I am Geoffrey Rose.The laser harp was inspired by the theremin, which I had built from a kit many years before.In 1976 I designed the first harp to create a digital theremin.I used a 5mw laser divided into 10 beams, which created a 5 X 5 matrix of intersecting beams in an octagonal frame.There is a pic on Laser Spectacles website.By using photoresistors at the end of the beam paths and by using AND gates diodes, 25 different sounds were produced by a synthesiser in circuit with the resistors...easy...

Geoffrey Rose

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13y ago

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