This switching buck regulator with the NE5560 was found in the February 1980 issue of Radio Electronics magazine. The power transistor must be provided with a heat sink.
This 2003 circuit is powered by the telephone line itself. Its purpose is to notify you when there...
I found this circuit in a 1992 Electronics Experimenter Handbook. The circuit can be easily...
This circuit was obtained from an American documentation from the 1970s. Information on the...