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.
Motors up to 2 A DC can be controlled by this circuit that we find in the manual for linear...
We found this circuit in the October 1992 Radio Electronics magazine. The frequency is given by C1...
This voice scrambler is used to obtain effects in the 2.5 to 5 kHz range. The circuit is from...