This circuit is from a Radio Electronics from August 1992. The transistor used allows the control of motors up to about 5 A. It must be equipped with a heat sink.
We found this circuit in an American 1980s documentation. Other comparators can be used and the...
This circuit was found in Signetics documentation from the 90's. The circuit performance curve is...
The operational amplifier used on this 1968 circuit is not common today. However, the setting can be...