Description The 1203B PWM DC Motor Speed Regulator is a compact, highly efficient motor driver module designed to control the speed of brushed DC motors, fans, or LED brightness using Pulse-Width Modulation (PWM). It regulates speed seamlessly by altering the duty cycle from 0% to 100% without losing motor torque. Core Technical Specifications Input Voltage Range: DC 6V to 28V Maximum Continuous Current: 3A Maximum Output Power: 80W PWM Frequency: 21 kHz Duty Cycle Adjustable Range: 0% to 100% On-Board Control: Built-in rotary potentiometer knob. Safety Protection: Built-in self-recovery fuse for overcurrent faults. Standard Pinout Configuration The module features a 4-screw terminal block: Power + (V+): Connect to the Positive terminal of your DC power supply. Power - (Gnd): Connect to the Negative terminal of your DC power supply. Motor + (M+): Connect to the Positive terminal of your brushed DC motor. Motor - (M-): Connect to the Negative terminal of your brushed DC motor. Critical Operating Rules No Reverse Polarity: Reversing the positive and negative power inputs will destroy the controller. DC Brushed Motors Only: This regulator cannot be used with AC power supplies or brushless motors. Testing Requires a Load: You must connect a functional DC motor to accurately test the speed control. A multimeter alone will not show voltage changes. Shipping information Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.