Remote Controlled Siren - School Electronics Project

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Carmichael_NZ

Joined Mar 6, 2013
1
Hey,
I'm making a remote control siren in electronics at school - it is running off USB power (that's all going), but I need a cheap way to switch it on and off though a wall. i have a couple of old phones at home that i could use, but i don't have to use them
 
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