This high-sensitivity circuit was found in a 1980s documentation. The source can be a 9 V battery with a splitter to make it symmetrical. The shock can be 200 uH or more.
This 1-transistor Hartley oscillator generates an audio signal that is dependent on capacitor C1....
This modulator circuit can be used in AM transmitters up to about 10 W of power. The TDA2002 must...
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...