DC Motor Control Circuits | DC Electric Circuits Worksheets wwwboutcircuits›Worksheets›DC Electric CircuitsThe electrical power used to energize a circuit in which a particular output is expected is sometimes referred to as “excitation.” Bridge circuit power supplies are another example of an “excitation” source. This is a very important, but often misunderstood, aspect of DC motor control. Motor Control Circuits – Page 10 – Circuit Wiring Diagrams The circuit shown below is of a DC motor driver circuit based on the IC TC4424 from Microchip. TC 4424 is a dual MOSFET driver that can be used in a variety of applications like SMPS, pulse transformer drivers, line drivers, motor drivers etc. The speed and of direction rotation of the motor depends on the logic levels of pin 2 and 4.