This circuit was found in a Hands On Electronics from the 90s. It is intended to supply old tape players to batteries with a voltage of 7.5 V from the 12 V of a car battery or source.
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
This Maxim Voltage Supervisory integrated circuit can be obtained from Mouser Electronics. It has...
The transistors in this circuit, found in an American publication in 1975, can be replaced by...