This motor speed control with tachometer sensor was found in the 1993 Radio Experimenter Special Projects. The maximum current is 2.4 A.
We found this configuration in the Linear Applications Handbook of the National Semiconductor of...
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...
Using the ULN-3784B this circuit typically supplies 5 W at 24 W. However, it can operate from 9 V....