This circuit was found in a Radio Electronics magazine from June 1962. The circuit is for cars of the time with platinum ignition. The indication is made on an analog instrument.
This is a traditional circuit in which a 741 operational amplifier is used as an audio amplifier with...
Indicated by the Maxim Engineering Journal in the 90's edition, this circuit uses only one...
This flasher for incandescent lamps was found in Radio Electronics magazine from July 1968. The...