Suggested by Sprague in the 90's documentation, this circuit applies to AC motors. The documentation does not indicate the maximum engine power that can be controlled.
We found this circuit in an American 80's documentation. The circuit can be adapted to function as a...
Found in a 1964 Electronic Design, this circuit makes use of FETs of the time. These transistors can...
We found this circuit at Modern Electronics in January 1991. The magazine no longer exists, but...