This circuit was originally designed to measure capacitance with an ICL7107 but can be used with other digital modules. The circuit is from Electronics Now magazine from November 1996.
This circuit from the 40's is a conventional analog multimeter with several scales. Its accuracy will...
With this circuit, an external circuit can be controlled by turning it on or off and reversing it (if...
This circuit appears elsewhere on this site, but from different sources. Using the LM3900, we find this...