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 sequential circuit drives 6 SCRs that control incandescent lamps. Other types of lamps should...
The circuit illustrated in Figure allows external loads (8) to be driven from parallel port...
This circuit that emits siren sound can be used in a fire alarm. We found it in an old American...