This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is from the 90s. The operational ones used admit modern equivalents.
Published in Radio Electronics magazine in March 1963, this circuit uses 4 transistors of the...
The LM11 operational amplifier is not common today. The circuit was obtained in the Linear...
This project was found in a 1988 documentation. The circuit intermittently activates an aquarium...