Watch this video for a demonstration of “How To Build a Laser Security System”. To complete the task, you will need:
A laser pointer
Get started with the first step: Build the circuit. Center the microchip on the circuit board. Pop in the voltage regulator. Connect the battery clip leads to the regulator. Run 2 more leads out from the regulator. Pop in the resistor and the photo cell. Link the chip to the photo cell. Pop in the relay. Link the chip to it as well. Link the other side of the relay to “power.”
For the complete guide, go to http://www.howcast.com/videos/2947-How-To-Build-a-Laser-Security-System
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Duration : 0:4:4
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