Found in a 90s Popular Electronics, this circuit provides sinusoidal signals at frequencies given by the components, as shown in the table beside the circuit.
This 1987 circuit uses a common ignition coil to generate high voltage to power a fluorescent lamp that...
This circuit is from the American magazine that no longer exists Science & Electronics,...
This circuit is from a 1975 technical documentation on filters. The FET can be a BF245 and the...