This circuit for voltmeter has an output of 1 V for 100 uA having been suggested by American publication of 1969. The transistors are general purpose types.
The resistors in this circuit marked with * must be within 1% tolerance. The circuit is from the...
This amplifier with very high input resistance has variable gain and must be powered by a...
This regulator is equivalent to 2 AA batteries providing a 5 V output voltage. The circuit is from...