This circuit, which uses a quadruple comparator, was found in old American documentation. The response curve is shown next to the diagram and can be adjusted in the trimpots.
This conventional power supply circuit with the LM317 was found in a 1987 publication and its...
This circuit is from a 1972 German magazine Funkshau. The circuit can use BC548 transistors...
Found in a 1968 Motorola documentation, this circuit operates at 1 kHz and can deliver 20 V from...