This circuit was found in a Texas Instruments documentation from the 1980s. The circuit monitors engine temperature by warning of engine warm-up and warning when the fan is on.
This simple radio receiver can pick up AM stations in the MW range from 520 to 1600 kHz using a...
This circuit, which may have appeared elsewhere on this site, is from the integrated...
This circuit is from an American 1964 documentation. Transistors of the time are used, but modern...