This circuit keeps a set of lamps permanently on, even when there is a power cut. The circuit can be adapted to use LEDs and the 12 V battery can also be changed according to the lamps or LEDs.
This circuit was found in a 1973’s Japanese magazine. It uses transistors of the time and is...
This cassette player motor speed control was found in the January 1991 issue of Radio Electronics...
This circuit was obtained in a 1982 English magazine. The purpose of this circuit is to make an...