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.
The integrated circuit is from the time. This low-power circuit was found in the April 1973 issue...
This small amplifier, close to 1 W, was found in a 1963 documentation. The class B circuit uses...
This source of constant current was obtained in an American documentation of 1973. The transistors can be...