We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
The circuit presented with low drift is from the Motrorola LinearDatabook of 1990. The circuit...
This circuit consists of an adapter that allows the reading of low currents at various scales. A...
This circuit for the automatic activation of a small lamp (or high brightness LED) was found in...