This circuit uses three inverters to generate a rectangular signal whose frequency depends on R1 and C1. The circuit is from a March 1996 Electronics Now.
This circuit, when triggered, locks, and remains so until the source is switched off for a moment or...
With the values of the components indicated, this timer controls intervals from a few seconds to a...
This circuit with a few watts of power was found in the April 1995 issue of Electronics Now...