Laser Pointer Switch using arduino

This instructable will detail how to make a switch that uses an arduino to sample light. When the light sample reaches a threshold it will trigger a relay that can be used to turn on/off a small appliance (light, radio, fan, etc...) The parts for this instructable can be ordered as a kit: Jameco Kit http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2209967_-1 Step 1: Review relay and prep ...

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