This circuit was published in Radio Electronics magazine in June 1959. The circuit uses an inverter with transformer to generate the high voltage of the Geiger tube.
This QST circuit generates 4 frequency signals according to the crystals used. Transistors admit...
This circuit generates signals from 0.01 Hz to 10 kHz, but uses unusual components today. The...
This dimmer or light control for incandescent light bulbs or even small heaters, is one of many...