MATRIXSYNTH: Instrument-a-day 26: optical siren


Sunday, February 26, 2012

Instrument-a-day 26: optical siren


"A perforated disk glued to an old cassette player motor interrupts ambient light and makes tones on a tiny optical diode connected to an amplifier."
Posted by matrix at 2/26/2012 04:06:00 PM
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