This classic windscreen wiper interval setup was found in American documentation from the 90s. The circuit can be found with variations at other points on this site.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
This simple circuit indicates whether at a point in the wiring of a car 12 V is present. The clip...