This circuit was obtained from the Encyclopedia of Electronic Circuits volume 5 of 1995. The circuit uses the 4001 CMOS to obtain hysteresis in the sensor feedback.
This circuit was found in a 2006 publication. It uses discrete components and CMOS that are still...
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...
This simple circuit, from a 2006 documentation, activates a 12 V lamp in the event of a power...