Found in a 1969 Burr-Brown publication, this circuit makes use of integrated components from that period. With modern equivalents, it can be adapted to be used as a shield.
We found this circuit in an English publication. The transistor can be a BC558. The instrument can be...
This circuit was found in a 1965 General Electric publication. The circuit can be adapted to...
This simple circuit helps to save incandescent lamps by leaving their filament slightly heated and thus...