Description:Introduction to PWM:The full name of pulse width modulation: Pulse WidthModulator, referred to as PWM. Due to its special properties, it is often used as a dimming or DC motor speed regulation in DC loops.This circuit is a motor controller fabricated using the principle of pulse width modulation (PWM). There are two advantages to using this method to control motor speed:It mainly changes the duty cycle of the output square wave so that the average on-time on the load changes from 0-100% to achieve the purpose of adjusting the load brightness/speed. Feature:The products are equipped with external speed control knobs. Positive and negative control, (positive stop) products are equipped with positive and negative switches. Using high-quality chips, the filter capacitor uses monolithic capacitors, and the circuit is stable and reliable. The heat sink area used by this governor is more than twice that of similar products on the market, and can meet the needs of 60W-150W motors. The controller uses PWM speed control technology, which has the characteristics of high conversion efficiency, wide speed range and stable performance. Specification:Maximum output power: 150WMaximum continuous current 6APWM Pulse Width Modulation Range: 0%-100%Size: 73.5*45.5*27mm / 2.9*1.8*1.1in(length * width * height)Installation hole center distance: 63.5*36.5mm / 2.5*1.4inLocation hole diameter: 3.5mmWeight: 69g / 2.4ozPackage list:1 * Adjustable DC Motor Speed ControllerNote:The actual product color may deviate from the photo due to light.There may be a slight deviation in the measurement of product.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.Use and wiring method:Connect the motor, the motor line can be positive or negative. Adjust the switch, the forward and reverse switch is used to control the direction of the motor speed. When the switch is at the zero position, the motor stops. Potentiometer knob, adjust the potentiometer knob to change the governor output duty cycle, motor speed changes. .