This circuit makes use of a 741 single source operational amplifier to measure resistors on a linear scale. The circuit may use as an indicator a common multimeter on a low current range.
Other voltage comparators can be used in this circuit that we found in a Popular Electronics from...
Published in a February 1978 Radio Electronics magazine article, this digital circuit uses some of...
This circuit was obtained in an English magazine from 1980, but it can be easily assembled today....