This charger for automotive use provides a 0.42 A output current. We find it in an American documentation from the 90's. The transistor must have a heat sink.
This circuit was found in an 1888 publication. However, since it uses common components, it can...
The input impedance of this circuit is about 700 k ohm and the output impedance is about 1 k ohm....
This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote...