The circuit shown was obtained in American documentation from 1968. MOSFETs can be replaced by equivalents. The circuit dissipation is less than 0.5 mW.
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...