Motor Driver Circuit Using Transistor

If you want to rotate your motor in only one direction then this is the easiest way to do so.

Motor driver circuit using transistor.

Here power transistor is used as a switch to turn a motor on or off depending upon the applied voltage at base. We use the four transistors as a switch controller. The h bridge motor driver circuit this circuit is called h bridge because the mosfets form the two vertical strokes and the motor forms the horizontal stroke of the alphabet h. It is the simple and elegant solution to all motor driving problems.

But unable to control direction of the motor. Hello everyone in this instructable we will be using transistor as a motor driver. So we need a h bridge of transistors in order to control speed as well as direction of the motor efficiently. The direction can be changed easily and the speed can be controlled.

Let in be the input to the base of the transistor. Transistor based dc motor driver circuit is one of the simple dc motor driver circuit. The classic beginner s dc motor driver circuit that appears in every electronics textbook is the bipolar transistor h bridge. But the driver circuit for a bipolar stepper motor requires an h bridge type connection.

Hence we use h bridge ics like l293d to drive bipolar stepper motors. Actually we can t say it as a motor driver as it can just toggle motor on or off rather than controlling the motor speed or direction. The name h bridge refers to the look of the connection consisting of four transistors and a motor in the center forming the letter h. It uses a power transistor d880 dc motor and a resistor for its operation.

And add a diode to protect the electricity that may flow backward from the motor. The same motor driver circuit is used in making a simple line follower robot. Because the single transistor motor driver was able to control the speed of motor. Using transistor single direction control.

But using the transistor protects our arduino from burning out. Stepper motor driver using bi polar transistors this stepper motor driver circuit uses the bd681 bi polar transistors for switching current to the coils. Its circuit is shown below. An h bridge is an arrangement of transistors that allows a circuit full control over a standard electric dc motor.

To the collector of the transistor the dc motor is connected. The driver circuit for a unipolar stepper motor can be constructed with the help of few transistors or a darlington transistor ic like uln2003. An h bridge is a simple electronic circuit consisting of four switching elements like transistors bjt or mosfet that can drive a motor in both the directions without switching the leads.