This soft start circuit was found in a 1965 General Electric documentation. The SCR and bridge diodes must be in accordance with the controlled motor's current.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...