PWM DC Motor Speed Controller 5–30V 5A with Adjustable Speed Control

DC Motor Speed Regulator for Brushed Motors, Fans, Pumps and LED Strip Brightness Control

This PWM DC motor speed controller is a compact electronic module designed for smooth speed adjustment of DC motors using pulse width modulation (PWM) technology. It operates with a wide input voltage range of 5V to 30V DC and supports a maximum continuous output current of up to 5A, making it suitable for various low-voltage electronic and electromechanical applications.

Speed adjustment is performed using an integrated rotary potentiometer with a convenient plastic control knob. By changing the PWM duty cycle, the controller adjusts the average power delivered to the motor without the need for large power-dissipating resistors. This allows smooth speed regulation while maintaining high energy efficiency.

The module operates at an approximate PWM frequency of 12 kHz, providing stable motor control and helping reduce the characteristic high-frequency whining noise generated by motor windings. In addition to controlling DC motor speed, the controller can be used to adjust small fan and pump speeds, as well as the brightness of compatible 12V and 24V LED strips.

The compact circuit board measures 40×30×15mm and features screw terminals for the power supply input and load output. This makes wiring and installation convenient without directly soldering the power cables.

Key Features:

• Wide input voltage range: 5V to 30V DC.

• Maximum continuous output current up to 5A.

• Smooth motor speed adjustment using PWM technology.

• High energy efficiency above 90%, according to the supplied specifications.

• Approximate PWM operating frequency of 12 kHz.

• Integrated 100kΩ rotary potentiometer with adjustment knob.

• Screw terminals for convenient power and load connections.

• Compact design for easy integration into various devices.

• Suitable for DC motors, fans, pumps and LED lighting.

• Basic circuit protection elements against overload and short circuits.

Suitable Applications:

• Speed control of brushed DC electric motors.

• Battery-powered and low-voltage electrical devices.

• Small DC fans and cooling systems.

• Speed and flow adjustment of small DC pumps.

• Motor control in robotics and model-making projects.

• Brightness adjustment of 12V and 24V LED strips.

• DIY electronic and electromechanical projects.

• Various DC load control applications.

Technical Specifications:

• Type: PWM Power and Speed Controller

• Operating Voltage: 5–30V DC

• Compatible Power Supplies: 5V, 12V, 24V and other voltages within the specified range

• Maximum Continuous Output Current: 5A

• Control Technology: PWM (Pulse Width Modulation)

• Operating Frequency: Approximately 12 kHz

• Control Method: Manual rotary potentiometer

• Potentiometer Resistance: 100kΩ

• Output: PWM control for DC loads

• Connections: Screw terminals

• Protection: Basic circuit protection elements against overload and short circuits

• Dimensions: 40 × 30 × 15mm

Connection Guide:

• Power IN (+): Positive terminal of the DC power supply.

• Power IN (-): Negative terminal of the power supply.

• Motor OUT (+): Positive output to the motor or connected load.

• Motor OUT (-): Negative output to the motor or connected load.

Speed adjustment is performed by rotating the potentiometer, which changes the motor speed or the power delivered to the connected load.

Important Usage Information:

1. This controller is designed exclusively for DC loads. Do not connect it to a 220V AC mains supply.

2. Do not exceed the maximum continuous current rating of 5A.

3. Observe the correct input power polarity. Reversing the positive and negative connections may damage the control electronics.

4. It is primarily suitable for brushed DC motors and is not designed to directly control standard brushless DC (BLDC) motors.

5. Provide adequate cooling when operating continuously under higher loads.