In the figure we have a 9V source using a 5V 7805 regulator. The circuit is from an American documentation from the 90s. The circuit has a 12V input. The maximum current is 1 A.
This 3-and-a-half-digit voltmeter was obtained in a 1991 documentation. Actuating integrated...
Currents of a few milliamps are enough to drive loads up to 500 mA with this circuit. The...
This circuit was found in Mullard's transistor application manual from 1960. More modern...