This circuit multiplies the input voltage by 3 and can work with up to 12 V input. The current is a few mA. We found it in the Radio Electronics magazine of December 1992.
This circuit is from a high voltage tube source. It does not include the filament voltage that must...
This simple circuit published in the November 1962 Radio Electronics magazine beeps when the light...
This SCR relaxation oscillator was found in an 80's Electronic Design. It flashes a small...