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Build Like A Pyro!
Find many of the parts used on this site at our favorite online electronics shop
Take Me To The Gadgetory!
Laser Trip Wire

Posted March 12, 2015 by Chris

"In short, while the laser hits the photo-resistor, the LED is off. Once the laser is blocked, the LED will turn on. –The LED can be replaced with pretty much any additional electronics such as: motor control, solinoids, igniters, alarms, appliances, lighting, cameras or even interface with a computer to further expand possibilities with creative programming."

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