This circuit was obtained from the Radio Electronics Experimenter magazine in a special edition of 1990. The circuit generates high voltage discharges.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
In the figure we have the way to excite an LED with one of the 4 operational ones available on the...
In this version from the 60s, the indicator is a light bulb, but the circuit can be modernized with the...