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.
This is one of the first radios with an integrated circuit. The circuit is from a Radio...
This circuit already incorporates the amplification stage, since the oscillator is of the type of...
Output stages driving relays or other loads are plugged to the outputs of a 4017. The trigger...