Motor Driver Circuit Using Transistor

Hello everyone in this instructable we will be using transistor as a motor driver.

Motor driver circuit using transistor.

Because the single transistor motor driver was able to control the speed of motor. Here power transistor is used as a switch to turn a motor on or off depending upon the applied voltage at base. But using the transistor protects our arduino from burning out. Let in be the input to the base of the transistor.

Stepper motor driver using bi polar transistors this stepper motor driver circuit uses the bd681 bi polar transistors for switching current to the coils. 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. Transistor based dc motor driver circuit is one of the simple dc motor driver circuit. Also this motor driver dose not cost any more than 1 25 usd making it super cheap.

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 same motor driver circuit is used in making a simple line follower robot. So we need a h bridge of transistors in order to control speed as well as direction of the motor efficiently. But unable to control direction of the motor.

The classic beginner s dc motor driver circuit that appears in every electronics textbook is the bipolar transistor h bridge. If you want to rotate your motor in only one direction then this is the easiest way to do so. The bd6xx range is an npn darlington with a collector current rating of 4 amperes and there is a wide range of transistors available for use in this application. But the driver circuit for a bipolar stepper motor requires an h bridge type connection.

Its circuit is shown below. 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. It is the simple and elegant solution to all motor driving problems.

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. Using transistor single direction control. To the collector of the transistor the dc motor is connected. An h bridge is an arrangement of transistors that allows a circuit full control over a standard electric dc motor.

Hence we use h bridge ics like l293d to drive bipolar stepper motors. Bridge transistor motor driver as figure 5 we use the four transistors to connected into the h bridge circuit. We use the four transistors as a switch controller.