This is another sampling and holding circuit found in a factory manual from the 1980s. The circuit can be implemented with more modern components. The FET is not a common component today.
The indicator instrument of this transistor tester, from an Argentine publication of the 1970s,...
This simple 555 component tester was found in the November 1992 issue of Radio Electronics...
This circuit can use both separate LEDs and a common cathode display when one segment indicates...