Found in a Philips' 1968 documentation, this circuit is slightly different from the previous one. The components are also from the era, and modern equivalents can be used.
This circuit was found in an American publication from 1968. The transistors are from the time,...
The components of this circuit are exchanged for modern equivalent such as 470 K for the pot and...
This circuits shows how to use in operational amplifier as a basic voltmeter. Power supply must be...