This automatic shutdown circuit was found in a William Sheets from the 1990s. The circuit automatically shuts down a car's electrical system.
The circuit shown is from a 1975 Motorola thyristor manual. The triac can be of the TIC series and the...
This crystal tester was found on a 90s Ham Radio. Transistors are commonly used. The circuit is for...
This circuit was found in Radio Electronics magazine from April 1960. It was in an article that...