Suggested by General Electric in 1965 documentation, this circuit controls the current at a load from half to maximum power. The circuit is for loads up to 900 W with the indicated components.
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...