This circuit is designed to control static loads fed by direct voltage. The circuit is from Motorola documentation from 1968. Equivalent SCRs may be used depending on the load.
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...