Found in an American publication from the 90s, this circuit allows the supply of 3, 6 and 9 V devices with currents up to 1.5 A in the car.
This transistor source has the output voltage selected by zeners and the LED indication of which...
We found this circuit in a 1978 publication. It can be implemented with modern transistors like...
This circuit was found in a 1980s documentation. Similar configurations appear in the section, but from...