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The 1803BK PWM DC Motor Speed Regulator is an ultra-compact power control module designed specifically for driving small, low-voltage brushed DC motors and light electrical loads. Operating on high-efficiency Pulse Width Modulation (PWM), the board pulses power rapidly to achieve precise speed adjustment across a $0\%$ to $100\%$ duty cycle range without generating excessive heat or reducing motor torque at low speeds.

With an input voltage rating of $1.8\text{V DC}$ to $12\text{V DC}$ and a continuous output rating of up to $2\text{A}$ ($30\text{W}$ peak), this module easily powers hobby motors ($130,180,280,\text{N}20$), small DC fan units, and LED arrays. For enhanced circuit safety, the board includes an onboard $2\text{A}$ self-resetting PPTC overcurrent fuse that automatically trips during stalls or overloads and resets once cooled down.

Key Features and Benefits

• Ultra-Low Operating Voltage Range ($1.8\text{V}-12\text{V DC}$): Ideal for single-cell battery applications, $3.3\text{V}$, $5\text{V}$ USB power, and $12\text{V}$ DC adapters.

• Onboard Self-Resetting PPTC Fuse: Protects the module and attached power source against short circuits and motor stall overcurrents up to $2\text{A}$.

• Integrated Power Switch & Potentiometer: Smooth rotary knob offers linear speed control and clicks completely OFF when turned fully counter-clockwise.

• High Efficiency PWM Operation: Minimizes power dissipation, maximizing battery runtime in portable electronics projects.

• Compact Footprint: Miniature $32\times 32\text{ mm}$ PCB design integrates easily into tight enclosures or small robotic chassis.

• Solderless Terminal Block Wiring: Standard 4-pin screw terminal block for fast, solder-free power and load connections.

Technical Specifications

Wiring & Terminal Guide

1. Terminal Block Connections:

• $Power+$ ($V+$ / $IN+$): Connect to DC Power Supply Positive ($+1.8\text{V to }+12\text{V DC}$)

• $Power-$ ($G-$ / $IN-$): Connect to DC Power Supply Negative ($0\text{V}/GND$)

• $Motor+$ ($M+$ / $OUT+$): Connect to DC Motor / Load Positive Terminal

• $Motor-$ ($M-$ / $OUT-$): Connect to DC Motor / Load Negative Terminal

2. Connection Layout Table:

IMPORTANT OPERATING NOTES:

1. DC Supply Only: Always ensure the input voltage stays within $1.8\text{V}-12\text{V DC}$. Connecting to AC mains will damage the board instantly.

2. Reversing Rotation: Swap the Motor+ and Motor- lead connections to instantly reverse the motor's default rotation direction.

Applications

• Miniature Robotics: Speed control for N20 micro gear motors, TT yellow gearboxes, and toy car drive motors.

• Cooling Fan Adjustment: Controlling speed on $5\text{V}$ USB or $12\text{V}$ DC PC cooling fans for quiet performance.

• Mini Fluid Pumps: Adjusting flow rates on $3\text{V}-12\text{V}$ micro submersible or diaphragm water pumps.

• Low Voltage LED Dimming: Smooth brightness tuning for single-color $5\text{V}$ or $12\text{V}$ LED strips.

Package Includes

• 1 x 1803BK PWM 1.8V-12V 2A DC Motor Speed Regulator Module

• 1 x Potentiometer Mounting Nut and Washer

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Secure packaging to ensure safe transit of electronic components