This regulator can use BD'136 as the main transistor and as a reference next to a BC548 zener. The circuit provides a voltage of 9V from 12 to power devices that use batteries.
This 6-transistor receiver was manufactured in Japan in the 60s. The circuit is superheterodyne and has a 6V...
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...
This circuit was found in a 1980s documentation. The low voltage circuit uses a PUT. Transistors can...