This circuit for incandescent lamps was found in the February 1972 Radio Electronics magazine. The triac is rated according to the lamp power and the sensitivity adjustment is made in R1.
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...