Found in an Electronic Design, this circuit makes use of general-purpose bipolar transistors. The circuit can be adapted to operate at lower voltages
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...