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Photo cell (CdS photoresistor)

Adafruit · 161

AdafruitView vendor page$0.95 · In stock
Identifier
161
Price
$0.95
Availability
In stock

CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When it's light, the resistance is about ~1KΩ, when dark it goes up to ~10KΩ.

Light and colour

1 other option
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