PWM DC Motor Governor Speed Controller 4.5V-35V 5A 90W with Adjustment Knob for Model Vehicles, Robots, and DIY Projects, L30xW26xH14mm Compact Design with Switch Function
PWM DC Motor Speed Controller for 4.5V-35V Motors with 5A 90W Output Capacity

This PWM DC motor governor offers precise speed regulation for DC motors operating between 4.5V and 35V, with a maximum output current of 5A supporting motors up to 90W. Designed for electronics enthusiasts, model builders, and DIY project creators, the compact 30mm x 26mm x 14mm controller provides variable speed control through PWM (Pulse Width Modulation) technology. The 20kHz operating frequency ensures smooth motor performance without audible whine, while the manual potentiometer knob allows for straightforward speed adjustment from 1% to 100% duty cycle.
Features and Construction

The motor governor combines essential speed control functions in a space-efficient package suitable for integration into various electronic projects and mechanical systems.
Material and Build
Constructed with electronic components mounted on a PCB (Printed Circuit Board), the governor features a plastic adjustment knob for manual speed control. The board includes integrated circuits, resistors, capacitors, and a potentiometer arranged to manage PWM signal generation and power regulation. The compact build measures 30mm in length, 26mm in width, and 14mm in height, excluding the protruding adjustment knob handle.
Size and Practical Fit
With dimensions of 30mm x 26mm x 14mm, this motor governor fits easily into tight spaces within model vehicles, robotics projects, or custom electronic enclosures. The small footprint makes it suitable for applications where space constraints exist, while still providing full 5A current capacity for motors up to 90W power rating.
Uses and Placement

This speed controller serves multiple applications where variable DC motor speed is required, from hobbyist projects to educational electronics.
Event or Professional Use
In professional or educational settings, the governor can control motor speed in demonstration models, laboratory equipment, or prototyping systems requiring precise speed adjustment. The 4.5V-35V input range accommodates various DC power sources commonly available in workshops and educational institutions.
Everyday Home Use
For home workshop projects, this controller adjusts speed for DC motors in model trains, RC vehicles, ventilation fans, or custom automation systems. The simple knob adjustment provides intuitive control without requiring complex programming or setup procedures.
Benefits and Buying Value

The motor governor offers practical advantages for electronics projects through its combination of capability and compact design.
Reuse and Low Maintenance
The solid-state design with no moving parts (aside from the adjustment knob) contributes to reliable operation without regular maintenance requirements. The governor can be reused across multiple projects due to its broad 4.5V-35V input voltage compatibility.
Why Choose This Product
This PWM DC motor governor provides precise speed control in a compact package with straightforward operation through manual knob adjustment. The 5A output current supports motors up to 90W, while the 20kHz PWM frequency ensures smooth operation without high-frequency noise. The wide input voltage range from 4.5V to 35V makes it compatible with various DC power sources commonly used in electronics projects.
