The purpose of this circuit is to monitor the output voltage of a power supply. The under and over voltage indicator was found in the August 1991 Radio Electronics magazine.
This circuit with the known PLL 567 can be found in other versions in this section and in this...
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
This lock-up alarm circuit was found in a 1990s Radio Electronics magazine. The sensors are...