This 10-minute timer was found in the July 1994 Radio Electronics magazine. The relay must be sensitive to the supply voltage used. The capacitors determine time ranges.
This circuit was found in a 1980s English documentation. It is intended for old xenon lamp...
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
This circuit can be found in a 1970 Motorola documentation. The circuit can be implemented with general...