This circuit is from a 1966 Motorola Field Effect Transistors Manual. The circuit makes use of other components from the time. Modern equivalents can be tested.
The integrated circuit used in this project is not common today, but it can be implemented with more...
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This current meter with many scales was found in a 80s American documentation. The operational amplifier...