"Kinetics and Electronics Technical Resource Display Case"

Electronics and Kinetics Technical Resource Display Case
Electronic display object #	13	Photocell

Photocells are variable resistors whose resistance changes with light. They are not directional, but can be made so by putting the cell at the back end of a small diameter, black, cardboard or paper tube. Photocells come in many ranges of sensitivity and resistance. Cells that are about 1 Megohm in the dark seem to be the most versitile. This type of photocell is usually made from a semiconducting material called cadmium sulfide.

Photocells are available at Jameco and other electronics suppliers listed in the sources page .

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