This long interval timer was found in the September 1976 issue of Radio Electronics magazine. The output can be used to control a relay. The circuit achieves timings of up to 14 hours.
The circuit suggested in the figure differentiates the signal from the negative front of a...
This frequency triple oscillator circuit was found in an American publication in 1967. The FET is...
This circuit was originally recommended for an electric oven warning system. However, we can use...