Saturday, November 07, 2009

DIY Saturday: Evasive Beeping Thing

The beeping thing is a simple circuit board powered by a 9-volt battery and outputting a high-pitched whining sound through a tiny speaker. The pictures above show it hidden in a gutted power transformer, but you could just as easily hide it in anything else big enough to conceal the device. Check the video below to see the construction process and hear it in action.



DIY Evasive Beeping Thing

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