6V-24V 3A DC Motor PWM Speed Controller – Precise speed and direction control in one compact module
Looking to control your DC motor’s speed precisely—from a complete stop to full throttle—without the need for extra resistors, relays, or complex modules? This DC motor PWM speed controller is the perfect solution, offering smooth 0–100% speed adjustment and integrated direction reversal via a simple switch. It comes as a compact, ready-to-wire module for your convenience.
Note: The maximum input voltage is 28V DC. For safe operation, ensure your motor current does not exceed 3A.
Why choose this model? (Key Benefits):
- Smooth, Stepless Speed Control — The rotary potentiometer provides fluid adjustment from 0% to 100%, eliminating jerky movements or vibrations at low speeds.
- Integrated Direction Switch — Easily toggle the motor’s rotation direction without the need for rewiring or external components.
- Broad Compatibility — Works with any DC power source between 6V and 28V, including batteries, power adapters, and laboratory power supplies.
- High Energy Efficiency — PWM (Pulse Width Modulation) technology significantly reduces heat loss compared to traditional resistive methods, keeping your motor running cooler.
- Easy Integration — Featuring a compact design and clearly marked terminals, it works perfectly as a standalone unit or alongside microcontrollers like Arduino and Raspberry Pi.
Performance and Technical Details
Unlike a basic rheostat, PWM modulation doesn’t waste energy as heat; instead, it adjusts the duration of current pulses, ensuring your motor receives exactly the power it needs. The operating frequency is optimised to eliminate audible electromagnetic noise at low speeds, which is ideal for quiet projects. The reversal switch operates a dedicated polarity-switching circuit, allowing you to change direction on the fly. For maximum motor longevity, we recommend slowing the motor down before reversing.
| Parameter | Specification |
|---|---|
| Input Voltage | 6V – 28V DC (6V, 12V, 24V recommended) |
| Maximum Current | 3A |
| Speed Control Type | PWM (Pulse Width Modulation) |
| Speed Adjustment Range | 0% – 100% |
| Direction Control | Dedicated Forward/Reverse Switch |
| Control Interface | Rotary Potentiometer |
| Motor Compatibility | 6V, 12V, 24V DC Motors |
| Typical Applications | DIY, automation, robotics, fans, conveyor belts |
Operating Instructions
- Connect your DC power source (6V–28V) to the input terminals (+ and –).
- Connect your DC motor to the output terminals.
- Switch on the power; the motor will start at the speed set by the potentiometer.
- Turn the potentiometer clockwise to increase speed, and counter-clockwise to decrease it.
- Use the direction switch to change the rotation. Recommendation: Reduce the speed to minimum before reversing direction.
- Ensure your motor does not exceed a 3A nominal current—keep in mind that starting current can often be higher than the running current.
Package Contents
- 1x 6V-24V 3A DC Motor PWM Controller with direction switch and rotary potentiometer
Frequently Asked Questions
Will this work with a standard 12V laptop or router power supply?
Yes, any stabilised 12V DC power supply is compatible. Just ensure the power supply can provide enough current for your motor; otherwise, the power supply may overload.
Can I use this controller for a 5V motor?
This is not recommended. The minimum input voltage is 6V. Operating below this threshold may lead to unstable performance and potential damage.
Can I change the direction of rotation while the motor is running?
Yes, the switch can be used while the motor is active. To protect both the motor and the controller, we recommend reducing the speed to the minimum before toggling the switch.
Do I need an Arduino or other microcontroller to operate this?
No. It functions completely independently using the onboard potentiometer and switch. However, if you wish to integrate it with an Arduino or Raspberry Pi, it can be used as an external power module for motors that exceed the capacity of your digital pins.
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