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Security alarm

Written By MR HARI on Jumat, 09 April 2010 | 20.01

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This is Security alarm .If somebody disconnected the wire loop The speaker will generate a sound.I have used a circuit for my land.Then when a robber enter for my land i can know it earlier.when you setup this set the wire loop at the height of 1 feet from the ground.




Note


# Build this circuit on a pcb

# use a thin coil as the wire loop
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