This circuit was found in an American documentation from 1969. The circuit is a multi-indicator with resistors typically 47 k for R1 and 100 k for the others.
Similar to other circuits found in this section, this circuit is from a 1996 Electronics World;...
This circuit was suggested by Motorola's Linear Databook of 1990. The integrated circuit, uncommon...
We found this circuit in a 2005 Linear Technology manual. The circuit can operate directly on 3 V to 36 V...