This circuit for very long-time intervals was found in the March 1993 Radio Electronics magazine. Times of several days or even weeks can be achieved depending on the value of C1.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This circuit works like a solid-state contactor. We find it in General Electric documentation from...
CMOS integrated circuits are sensitive to supply voltages in terms of signal propagation time....