This power supply protection circuit was found in the December 1978 Radio Electronics magazine. The SCR is triggered by shortening the power supply and quickly blowing the protection fuse.
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...
This circuit triggers a relay when it gets dark, thus enabling the lighting of fluorescent lamps, which...
This circuit causes two LEDs to alternately flash at a frequency that depends on R1 and C1. R1 can...