Suggested by a 90s Radio Elecrtronics, this circuit is intended to supply mobile equipment of the time. The transformer data is given next to the diagram.
The base of this circuit is one of the four Norton amplifiers existing in an LM3900 integrated circuit....
This sensor with two transistors triggers a relay according to the supply voltage. The power...
This circuit is an improvement of the previous one, with the use of two transistors produces a...