This circuit activates a relay after a time given by C1 and R1. The circuit is from a Radio Electronics from December 1974. The relay voltage is the same as that used in the power supply.
This circuit was found in Linear Circuits Applications of Texas Instruments, originally using the...
This circuit with two operating modes was found in the September 1989 issue of Radio Electronics...
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The circuit is integrated is...