Introduction: Make a SPY Electronic Stethoscope
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About: Bill Nye the Science guy is my Hero... that and Bear Grylls...would be cool if they combined to become Bear Nye the Wilderscience Guy using science and technology to drink his own pee.
Just follow the link....its part of my other instructable! Make the ultimate receiver for the "MintyBeam" and see the last step!
https://www.instructables.com/id/MintyBeam-Bug-a-room-and-transmit-voice-over-a-la/#step1
