Found in a Popular Electronics from the 90s, this circuit can be used as an electrifier. T1 can be an old TV fly back transformer or an ignition coil.
This circuit was found in a 1994 publication. It draws 1 of 41 LEDs when we press and then release...
Published in Radio Electronics in January 1963, this circuit uses 5 transistors of the time. The...
This circuit excites incandescent lamps by making them flash alternately. There are 4 outlets and...