Topic: Simple Photocell
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What am I doing wrong with this simple LED/photocell circuit?
What you are doing is using the photocell as a transmitting device. It is having low resistance in presence of light, and passing current to the LED. That is opposite to what you wish. You must use the photocell in a circuit that controls t... Read More »
Source: http://answers.yahoo.com/question/index?qid=20090807152139AAR96rT
