Any sound can be sent to any FM radio from any room by this simple 2-transistor audio transmitter. Any sound can be sent to any FM radio from any room by this simple 2-transistor audio transmitter.
When it comes to surveillance, why let the government have all the fun? This tiny spy transmitter is just the thing you need to jumpstart your recreational espionage efforts. We kid, of course — ...
Ever wanted to act out your childhood dreams of being a spy? Make has a guide for building your own audio bugging device, which broadcasts an extremely low powered FM signal about 160 feet. The basic ...
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