We found this circuit in a Radio Electronics Experimenter from 1990. The circuit uses a common incandescent bulb and a car ignition coil.
This oscillator appeared in the September 1950 Radio Electronics magazine. The frequency is...
The SCR used in this 80's circuit depends on the load. The control is half wave and instead of the neon...
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...