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How to make a cheap, simple, and effective alarm system

How to make a cheap, simple, and effective alarm system
This is my fourth instructable. It is on how you can make an alarm without any expensive equipment. It takes very short to set up too.

materials

wire
bar magnet(s)
reed switch
tape
paper
battery with holder
buzzer
door
Intruders:)





result
 
 
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Step 1Step one: battery

Step one: battery
attach the battery/holder to the wall with tape (see pic) attach wires flowing downwards.
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6 comments
11
Aug 19, 2011. 12:39 PMK'nex gun builder says:
Yeah, maybe I should stop pranking him. Before he pulls the ULTIMATE PRANK! (Nervous)
18
Aug 19, 2011. 1:43 PMpatriots8888 (author) says:
then you just have to top that prank!
11
Aug 18, 2011. 4:33 PMK'nex gun builder says:
Cool! I used it to prank again. I put it in my brothers bedroom and plugged it underneath his bed. When he went to bed I snuck in his room, and turned it on. Then I tried to hide when he heard the buzzer, and man he was so FREAKED OUT!
18
Aug 19, 2011. 8:57 AMpatriots8888 (author) says:
lol thats awesome
10
Dec 16, 2010. 11:43 AMrtty21 says:
Cool. reed-switches are the best.
18
Dec 16, 2010. 11:46 AMpatriots8888 (author) says:
thanks

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Author:patriots8888
My name is Evan and i'm your average 7th grade kid i guess. I love to play sports like basketball because Im a baller :). I also like building anything AWESOME. I also like watching sports teams espec...
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