This filter, which rejects frequencies around 1 kHz, was found in the August 1993 Electronics Now magazine. The fine tuning is done at R3, and the source must be symmetrical.
The circuit shown in the figure consists of a phase shift oscillator and its components have been...
Powered by voltages from 6 to 12 V, this circuit from a Popular Electronics from the 90s,...
This circuit is nothing more than a voltage quadruplicator that can generate close to 1 000 V from...