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.
Capacitor C and resistor R in this circuit determine the time the output remains at the high level...
This configuration was found in an English magazine from 1965. It is valid for any junction FET. The...
This circuit was obtained in a Motorola documentation from 1966. The circuit can use a common FET...