This circuit has the spark duration controlled by a 555 timer. The circuit was found in the 1990 special issue of Radio Electronics Experimenter magazine.
Found in a 90s Radio Electronics, this circuit is intended to drive a neon lamp from a 9 V source....
This simple tester was found in a Popular Electronics from the 90s. The circuit is powered by two...
Electronics Now from the 90's suggests this pulse conditioner circuit for use in tachometers. The...