This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses an equivalent operating system. The source is not symmetrical.
This circuit with 1% regulation aims at replacing mercury cells. We found it in a 1967...
This transistor tester configuration can be found on this website with many variations. The...
This high current control circuit was found in a publication from the 1990s. The power transistor must...