This a simple but affective burglar alarm... It's messy right now but full proof! I will be coming out with a second and more cleaned up version of this alarm soon that will require only one or two more parts and be just as simple.

Step 1: Supplies (Not All Supplies Are Pictured)

Electrical and or duct tape An alarm or buzzer(found at a local RadioShack) Two paper clips A chip clip or clothes pin Connecting wire with various lengths A 9 volt batter Something to hold the wire to your battery And a card board square
When u goin to make the next one
Thanks for the great idea. Any other ideas for triggering the alarm
perhaps develop a security system to accompany it, some extra door alarms, a method to wire them together to a central hub and maybe some detterents/defences to be triggered by the alarms.

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More by ethanbigmac:Home Alarm Model 2 Home Made Security Alarm Desk Fan 
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