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The BEAM Circuits Collection is a BEAM Reference Library site.

1381-based photopoppers
A collection of photopopper circuits based on the 1381 voltage detector

Basic 1381-based photopopper


As you can see fairly quickly, this circuit is based on wiring two 1381-based solarengines together (with the addition of two photodiodes for photosensitivity, and a variable resistor for tunability).

1381-based photopopper with touch sensors


This circuit is a simple modification of the "Basic" circuit, above.

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Page author: Eric Seale
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