This circuit was found in the November 1994 issue of Electronics Now magazine. The circuit is based on the 566 PLL and generates signals up to about 200 kHz.
This circuit warns when the headlight bulb is on. We found it in a Popular Electronics from the...
The oscillator shown in the figure keeps its frequency constant in an active cycle adjustment...
This circuit was found in an Argentine publication from the 1970s. The circuit can be assembled with...