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 circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and...
We found this circuit in Linear Technology Applications of 1997. The circuit uses common...
Found in a 90's EDN, this circuit generates signals in the frequency range given by the graph. The...