DC Motor Speed Controller Circuit

Top 3 DC Motor Speed Controller Circuit Using Custom made PCBs

A speed controller circuit uses MOSFETs or IGBTs to control the speed of a DC Motor. A standard motor driver module gives a maximum current of up to 2 Amps. This current is not sufficient to run high power motors. So a separate controller is designed using transistors. These controller circuits fabricated on custom-made PCB from PCBWay can handle the current even up to 40 A safely.

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**To know more about the process of ordering a PCB from PCBWay, check out High quality and low-cost PCBs at your doorstep through PCBWay!

 

POWERFUL H-BRIDGE DC MOTOR DRIVER

Circuit connection of DC Motor speed controller
Circuit connection of DC Motor speed controller

In this project, the speed controller drives a windscreen wiper DC motor. The controller is built on a rectangle PCB, ordered from PCBWay. An Arduino Uno board provides the necessary controlling signals to the controller. The duty cycle is varied using the push-buttons provided on the keypad. And the PWM pulse obtained can be seen on the oscilloscope. The controller is efficient in running, braking, and changing the direction of rotation. The current-carrying capability of the PCB board is high with minimal heat losses.

 

COMPONENTS REQUIRED

  • Power MOSFET (IRF3205)
  • MOSFET driver (IR2104)
  • DC Motor
  • Arduino Uno
  • Resistors
  • Capacitors
  • Diodes
  • Push-buttons
  • Connecting Wires
  • PCB Board

 

PCB DETAILS

The image shows the PCB designed in the software.

Designed PCB of speed controller
Designed PCB of the speed controller

And right here is the fabricated PCB obtained from PCBWay.

Fabricated PCB from PCBWay
Fabricated PCB from PCBWay

The designed PCB looks similar to the fabricated PCB. The exposed PCB tracks can carry a high current safely without heating the PCB board.

**To know more about the following project, click on the link below:

 –> Powerful H-bridge DC Motor driver

 

DC MOTOR DRIVER USING L293d

DC motor driver
DC motor driver

The speed controller used here consists of an L293d IC with a custom motor driver made using transistors. Built on a custom made PCB, ordered from PCBWay. This combination is suitable for low and medium power circuits. The controller efficiently drives three motors in forward and reverse directions. The controller receives the controlling signals from a microcontroller. If the current required by the external load is low, then the circuit allows the operation of L293d alone. For moderate current requirements, both motor drivers serve the purpose.

 

COMPONENTS REQUIRED

  • L293d IC
  • Transistors
  • Resistors
  • Capacitors
  • LEDs
  • PCB board

 

PCB DETAILS

The image here shows PCB designed in software.

Speed controller PCB design
Speed controller PCB design

And here is the fabricated PCB received from PCBWay.

Received PCB from PCBWay
Received PCB from PCBWay

The designed PCB looks similar to the PCB received from PCBWay.

**To know more about the following project, click on the link below:

–> DC Motor driver using L293d

 

PWM DC MOTOR SPEED CONTROLLER CIRCUIT USING NE555

DC motor speed controller circuit
DC motor speed controller circuit

This project is simple than the projects discussed above. It allows speed control using NE555 IC. The IC and other components are assembled on a PCB board, ordered from PCBWay. A potentiometer varies the speed of the motor. As the duty cycle increases, the rotation of the motor increases.  The input and output current waveforms are viewed by attaching an oscilloscope to the PCB board. The circuit is compact, simple, and used for low power motors. PWM has advantages over discrete switching in the case of inertial loads like motors. For a smooth output waveform, the switching frequency must be higher.

 

COMPONENTS REQUIRED

  • NE555 IC
  • Transistors
  • Potentiometer
  • Diodes
  • Capacitors
  • Resistors

 

PCB DETAILS

The PCB is simple to design. The fabricated PCB received from PCBWay is shown in the figure below.

Fabricated PCB from PCBWay
Fabricated PCB from PCBWay

On soldering the necessary components, the PCB board looks like this.

Assembled circuit of speed controller
Assembled circuit of the speed controller

Although the PCB board looks compact, it is highly efficient for driving small loads.

**To know more about the following project, click on the link below:

–> PWM DC motor speed controller circuit using NE555


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