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DC motor governor enter for the DC,can no longer be straight linked to the AC ( to illustrate : 220V AC 220V )otherwise it'll burn ! The effective and negative terminals of the DC strength delivery should not reversed,otherwise the governor may possibly be broken The motor can be both positive or damaging When the direction of operation and expectancies do not match,you can adjust the path of the road order Adjust the potentiometer knob to alter the governor output duty cycle,the motor velocity changes 5A PWM Specifications: Operating voltage: DC4 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 (Without Handle) Precautions: DC motor governor input is DC,can in a roundabout way related to the AC (for example: home 220V AC),otherwise it will burn! DC power delivery superb and unfavorable terminals do not reverse,otherwise the governor may be damaged The motor could be wonderful or negative,when the course of operation and expectations don't match,you can alter the line order to change the direction Adjust the potentiometer knob to alter the governor output responsibility cycle,the motor pace adjustments MINI 5A PWM Incorporate a 30V 2 fuse,and with the safety function of opposite connect strength delivery It is not just to use for dc motor controls of the speed,but also to apply for regulate the LED mild Adjustable pace fluctuate is 1%-100% Operating Voltage: DC3V-35V Control Power: 90W (maximum) Quiescent Current: zero (standby) PWM Duty Cycle: 1% -100% WM Frequency: 10khz Size: 24*30mm/0*1"