Using a pair of period A/D converters, this 3-digit circuit was found in the 1992 Radio Electronics Experimenter magazine. The sensor is a thermistor.
Found in an old Radio Electronics, this circuit is intended for the modulation of composite video...
) This variable frequency oscillator was found in an old American documentation. Transistors allow more...
This ultra-simple experimental receiver can be powered by a battery of water and salt. It was...