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CRYSTAL RADIO
Mad of science | August 2nd 2009 by ARASARAJA
A crystal radio is the distilled essence of a radio. It has very few parts, it needs no batteries or other power source, and it can be built in a short time out of things you can find around the house. The reason a crystal ra read more
Emergency Radio
Circuit Electronic | July 14th 2009 by Quick Zone
Emergency Crystal Radio Crystal radio requires no power supply to operate because it uses energy from the signals it receives. Performance is – like one should expect – poor. Nevertheless, with a good antenna and proper ground, it shouldn read more
Crystal Radio (and other purpose) Audio Amplifier
Circuit Project Electronic | July 1st 2009
Here is a simple audio amplifier using a TL431 shunt regulator. The amplifier will provide room-filling volume from an ordinary crystal radio outfitted with a long-wire antenna and good ground. The circuitry is similar in complexity to a simple one-t read more
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