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LASER BURGLAR ALARM
Unseen burglar alarm.
$5 Dollar Burglar Alarm!
Laser powered burglar alarm
How to stop people from coming in your room with electronics
SIMPLE ARDUINO ULTRASONIC SENSOR DOOR ALARM.
Fire Alarm Circuit using Thermistor
Childrens Museum of Houston
Laser Trip Wire Security System with Combination Lock and Epic Siren!
DIY Appliance Removal (Theft) Alarm - So Simple!
Posted:Nov 9, 2010
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