20pcs Mini DC 4.5V To DC 35V 5A 90W DC Motor PWM Speed Controller Module Speed Regulator Adjustable Switch Board

Specifications: Operating voltage: DC4.5V-35V Output current: 0-5A Output power: 90W (max) Quiescent current: 7uA (standby) PWM duty cycle: 1% -100% PWM frequency: 20khz Size: 30mm x 26mm x 14mm Precautions: -DC motor governor input is DC, can not directly connected to the AC (for example: home 220V AC) otherwise it will burn. -DC power supply positive and negative terminals do not reverse, otherwise the governor may be damaged. -The motor can be positive or negative, when the direction of operation and expectations do not match, you can adjust the line order to change the direction. -Adjust the potentiometer knob to change the governor output duty cycle, the motor speed changes. Package Included: 20 x PWM DC Motor Speed Controller