via vtol
"Solar Parasit is a small audio synthesizer for personal use.The parasite is charged during the day by a solar panel from the sun or a bright light. When a bright light disappears, the device begins to 'sing' through headphones. The parasite has a little eye on the end of a long tube through which the light is captured when it is surrounded by darkness. With the headphones on, users can walk around the city at night, listening to the parasite's singing in response to the light from headlights, advertising and other ambient lighting.
The principle of the parasite is very simple: it is a small square-wave generator for IC 555 with integrated photoresistor that controls the frequency of the oscillator. This kind of devices is sometimes called 'light theremin'.
first release- Polyfest, VDNKh, Moscow, 07.09.2013"
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