The presented circuit measures currents and voltages with precision that depends on the tolerance of the resistors used. The instrument is a microammeter and more scales can be added.
We found this circuit in a 70s American documentation. The integrated circuits are from that time....
The integrated circuit used in this regulator is unusual, as are the transistors. The circuit is...
This circuit was found in an old Radio Electronics, but can still be assembled as the components are...