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 shown is from a 1974 integrated circuit manual. In it we have the monostable...
This soft starter dimmer was found in a 1980s documentation. We can implement it with current...
The contact of the sensor with water or humidity causes the relay to close its contacts. The...