Hear with Ultrasound Using a TL494 as a Flanagan Neurophone

Patrick Flanagan invented the “Neurophone” over 40 years ago. His original patent (US3393279) was basically a radio transmitter that could be picked up by the human nervous system. It modulated a one-watt 40kHz transmitter with the audio signal, and used very near-field antennas to couple it to the body. It... Read more »

Small Amp

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  • 12/18/2012 @ 10:55 pm

This was one of the first circuits that got me into making. It’s very simple and can be used to amplify audio output (mp3 player, computer, etc.) as well as electric guitars. Read more »