Photodiode-LED Servo

This fun circuit adjusts the brightness of an LED as it is moved in relation to a photodiode so that the photocurrent produced remains constant. Themes from this circuit can be used for a variety of applications. For example, instead of powering a LED, the circuit could adjust window s...

By: gbarlow03



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from Instructables: exploring - technology http://ift.tt/1EFAGFS