This protection circuit for symmetrical 28 V power sources was found in a 1968 EEE documentation. The circuit can be adapted to use modern equivalent components.
Some old analog multimeters use a 22.5 V battery for high resistance measures. These batteries can no...
This circuit was found in RCA and General Electric documentation from the 1980s. The circuit has...
Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an...