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 circuit uses a metal enclosed transistor as a temperature sensor. The circuit is from an old...
This simple intermittent siren circuit was found in a 1989 documentation. Both the intermittent and...
A high-frequency square wave oscillator using an LC-tuned circuit is shown bellow. The upper...