Found in the September 1982 issue of Radio Electronics magazine, this circuit triggers a relay intermittently. Triggering is done by a reed switch, but other types of sensors can be used.
Found in Linear Technology documentation from the 90s, this circuit uses components from that...
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...
This circuit is from 1987 when there were only analog TVs and stereo sound was still a novelty for this...