Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given components. The FET can be of general use. The coil has only indicated the number of turns.
This sensitive circuit was found in the August 1971 issue of Radio Electronics magazine. The SCR...
Suggested by General Electric, this circuit with triac is able to reverse the rotation of a motor...
This circuit applies to an old dial phone by detecting light pulses in the dial. The circuit is...