Mini PWM DC Motor Speed Controller 5A 90W 5V–35V LED Dimmer

Mini DC Motor PWM Speed Controller — 5A, 90W, 5V–35V

Take precise control of your DC motors, fans, and LED lighting with this compact PWM Speed Controller. Designed for makers, hobbyists, electricians, and DIY enthusiasts, this ultra-small module delivers smooth, stepless speed regulation across a wide voltage range — from 5V all the way up to 35V — making it one of the most versatile mini controllers available.

Measuring just 30mm × 24mm, this controller fits neatly into tight enclosures, project boxes, or custom builds without adding bulk. Whether you're regulating the speed of a ventilation fan, adjusting conveyor belt motors, or fine-tuning the brightness of a DC LED strip, this PWM controller handles it effortlessly.

Key Features

• Wide Voltage Compatibility: Works with 5V, 6V, 12V, 24V, and up to 35V DC power supplies
• High Current Capacity: Handles up to 5A continuous current and 90W maximum power
• Smooth PWM Speed Control: Stepless adjustment via onboard potentiometer knob for precise, flicker-free regulation
• Dual Function: Suitable for DC motor speed control AND LED light dimming
• Compact Form Factor: Ultra-small 30mm × 24mm PCB — easy to integrate into any project
• Simple Wiring: Clear terminal connections make installation quick and straightforward
• Durable Construction: Quality components for reliable, long-lasting performance

Specifications

• Input Voltage: 5V – 35V DC
• Max Current: 5A
• Max Power: 90W
• Control Type: PWM (Pulse Width Modulation)
• PCB Dimensions: 30mm × 24mm
• Speed Adjustment: 0%–100% via potentiometer

Ideal Applications

• DC motor speed regulation (fans, pumps, conveyors)
• LED strip and DC lamp dimming
• DIY robotics and electronics projects
• Aquarium pump and ventilation control
• 3D printer and CNC machine motor management

For more information on electrical safety when working with electronic components, visit the U.S. Consumer Product Safety Commission's Electrical Safety resource.

Learn more: Electronic speed control

Frequently Asked Questions

Q: What is a PWM DC Motor Speed Controller and how does it work?

A: A PWM (Pulse Width Modulation) speed controller rapidly switches the power supply on and off at a variable frequency to control the average voltage delivered to a DC motor or LED load. By turning the onboard potentiometer, you adjust the duty cycle — giving you smooth, stepless control over speed or brightness without generating excess heat, making it far more efficient than resistor-based methods.

Q: What types of motors and loads is this controller compatible with?

A: This controller is compatible with any brushed DC motor or DC LED load operating between 5V and 35V. Common applications include small fans, water pumps, conveyor motors, LED strips, and other DC-powered devices drawing up to 5A (90W max). It is NOT suitable for AC loads or brushless motors without additional circuitry.

Q: Is this PWM controller easy to wire and install?

A: Yes — the controller features clearly labeled screw terminal connections for power input and motor/load output. Simply connect your DC power source to the input terminals and your motor or LED to the output terminals, then use the potentiometer knob to dial in your desired speed or brightness. No additional components are required for basic operation.

Q: Can I use this as an LED dimmer switch?

A: Absolutely. In addition to motor speed control, this module works excellently as a DC LED dimmer. It supports smooth, flicker-free brightness adjustment for DC LED strips and lamps within the 5V–35V, 5A operating range — making it a versatile choice for lighting projects and custom installations.