1203BK PWM DC Motor Speed Controller – 6V to 28V / 3A Adjustable Regulator with Capacitors

Description

Product Overview

The 1203BK PWM DC Motor Speed Controller is a robust and reliable speed regulation module designed for medium-power DC motor applications. Utilizing advanced Pulse Width Modulation (PWM) technology, this controller provides smooth, stepless speed adjustment from 0% to 100% duty cycle, allowing you to precisely control the speed of your motors with a simple twist of a knob .

Engineered for versatility, the 1203BK accepts a wide input voltage range of 6V to 28V DC, making it compatible with a vast array of common power sources including 6V, 9V, 12V, and 24V batteries, power supplies, and even some 28V industrial systems . With a maximum current capacity of 3A, it can handle loads up to 84W (at 28V), suitable for a wide range of pumps, fans, robotics, and automation equipment .

A key design feature of this module is the inclusion of built-in filtering capacitors . These capacitors smooth the output waveform, reduce electrical noise, and help ensure stable motor operation, particularly at lower speeds where PWM ripple can cause cogging or vibration .

The 1203BK serves as an excellent choice for a wide range of applications, including:

• Industrial automation and conveyor systems

• Robotics and animatronics

• Pump and fan speed control

• DIY workshop tools (drill presses, lathes)

• Laboratory and testing equipment

• 12V and 24V automotive and marine applications

Key Features

• Wide Input Voltage Range: Accepts DC input from 6V to 28V, providing compatibility with common 6V, 9V, 12V, and 24V power sources as well as higher-voltage industrial systems .

• 3A High Current Capacity: Handles continuous output currents up to 3A (maximum output power 84W) , making it suitable for a wide range of medium-power DC motors and loads .

• Built-In Filtering Capacitors: Includes onboard capacitors that smooth the PWM output waveform, reducing electrical noise and ensuring stable motor operation, especially at low speeds where PWM ripple can cause vibration .

• PWM Technology for Smooth Control: Uses high-frequency Pulse Width Modulation (approximately 21kHz on some variants) to provide vibration-free speed adjustment with excellent torque retention even at low speeds .

• 0%-100% Duty Cycle Adjustment: Allows full-range speed control from completely stopped to maximum speed, with linear response to knob rotation .

• Integrated Potentiometer: Features a robust rotary potentiometer (typically B100K resistance value) for easy and intuitive speed adjustment. The knob may also feature an integrated on/off switch on some variants .

• Compact and Rugged Design: Housed in a durable PCB with dimensions of approximately 32mm x 50mm x 15mm , the module is compact enough for tight spaces while providing robust mounting points .

• Easy 4-Terminal Wiring: Simple screw terminal connections for power input (VIN/GND) and motor output (OUT/GND) make installation quick and error-free .

• High PWM Frequency (Select Models): Some versions of the 1203BK operate at a 21kHz PWM frequency , which is above the range of human hearing, eliminating the annoying whine often associated with lower-frequency PWM controllers .

• Wide Operating Temperature: Engineered to perform reliably in various environments, with an operating temperature range suitable for industrial and hobby applications .

Technical Specifications