Found in General Electric documentation from the 1980s, this circuit generates signals that depend on the values of the components given in the table next to the diagram.
This circuit is from 1990 documentation. It uses a bridge with LEDs and the potentiometer must be...
This circuit has the spark duration controlled by a 555 timer. The circuit was found in the 1990...
Taking Raytheon's 3900 integrated circuits as an example, uncommon today, this circuit can be used...