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LASER BURGLAR ALARM
Unseen burglar alarm.
$5 Dollar Burglar Alarm!
Laser powered burglar alarm
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Fire Alarm Circuit using Thermistor
SIMPLE ARDUINO ULTRASONIC SENSOR DOOR ALARM.
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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