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detector project ...

Discussion in 'General Electronics Discussion' started by darby, Mar 15, 2013.

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  1. darby


    Mar 15, 2013
    Need any ideas on how I would make a zone alarm thats powered off a battery, have about a 3 to 4 foot zone and would be triggered by small battery powered signal transmitter when it enters the zone with a resulting alarm. It needs to be as small as possible. :) thanx.
    Last edited: Mar 15, 2013
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