Amateur Scientist
Experimenting with Light and Dark SENSORS
Use photoresistors, phototransistors, and photodiodes to make simple, powerful sensors for your projects.
Written by Forrest M. Mims III
Gunther Kirsch
Time Required: 1–2 Hours
Cost: $10–$30
Easy, inexpensive circuits to give your projects sensitive “electric eyes.”
FORREST M. MIMS III (forrestmims.org), an amateur scientist and Rolex Award winner, was named by Discover magazine as one of the “50 Best Brains in Science.” His books have sold more than 7 million copies.
Materials
Photoresistors, ...
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