The purpose of this circuit is to extend the range of applications from a Darlington pair to DC. The circuit is from an American documentation from 1970.
This source is used to supply circuits with operational amplifiers, being originally created for...
The transistors in this 80's documentation project may be BC548, the most modern equivalents of...
This circuit uses a FET to drive an LED with constante currente. The current up to 20 mA can be...