HW-687 Mini DC Speed Controller

Overview 

The HW-687 Mini DC Speed Controller is a versatile PWM governor designed for low-voltage applications. Unlike simple resistors that waste energy as heat, this module uses high-frequency PWM to pulse the power, ensuring high efficiency and maximum torque even at low speeds. It’s equipped with a high-current resettable fuse and a high-quality potentiometer that includes a physical “click” to turn the power completely off.

Key Features

• Ultra-Wide Voltage Range: Works with any DC source from 3V up to 35V.

• 90W Power Handling: Compact but capable of driving motors or LEDs up to 5A.

• Integrated Power Switch: The potentiometer knob doubles as an ON/OFF switch.

• Safety First: Features a built-in self-recovery fuse to protect your circuit from overcurrent.

• Miniature Design: Easily fits into small DIY enclosures, hand-held gadgets, or toy cars.

Technical Specifications 

Feature	Specification
Model	HW-687 / ZK-MG
Input Voltage	3V to 35V DC
Control Power	Max 90W
Quiescent Current	0.015A (Standby)
PWM Duty Cycle	1% to 100%
PWM Frequency	20 kHz
Dimensions	30mm x 24mm x 15mm