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How to Build a DC Motor Circuit (Diagram)

By aoba | Published on Sep 14,2015

DC motors are widely utilized in electronic products such as vehicles, fans and electric drills. Motors have made so great contributions to the modern society that it is worth learning how to build a DC motor circuit which can either rotate forward, reverse, or bidirectionally.

A DC motor includes a stator and a rotor. The stator is a permanent magnet and the rotor is an electromagnet. Upon energized to a power supply, the rotor rotates around the stator. The following is a diagram from which you can see how the DC motor operates.

How a DC Motor Works

DC Motor Circuit

It's not difficult to connect a DC motor to a circuit to make it rotate. Here is a diagram for a DC motor circuit. This DC motor is able to operate on 3-18V DC. And in the circuit, it is given a voltage of 9V DC.

DC Motor Circuit in Forward

When a DC motor is energized with DC voltage as shown in the above diagram, the DC motor rotates in a forward direction.

Reverse DC Motor Circuit

If the DC motor is energized with voltage reversely as shown in the following diagram, the motor will rotate in an opposite direction.

Here is the reverse circuit schematic of the DC motor:

DC motor circuit schematic in reverse

A Bidirectional DC Motor Circuit

A switch is needed in building a bidirectional DC motor circuit in order for us to choose forward motion or reverse motion whenever necessary. The flip of a switch allows us to control the forward and reverse voltage. The following is the diagram of the bidirectional DC motor circuit which enables forward and reverse motion with the flip of a switch.

Bidirectional DC Motor Circuit

When the switch is connected to the upper circuit, the motor rotates in the forward direction. When the switch is connected to the nether circuit, the motor rotates in the opposite direction. This application has been utilized in many parts of our daily life such as cars and power drills.


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