DC DC Converter Adjustable Power Supply DC-DC Step Down 3A LM2596HVS LM2596HV DC Step Down Buck Converter Power Input 4.5V-60V_x000D_ _x000D_ Input voltage : DC 4.5 - 60V_x000D_ _x000D_ Output Voltage : 5V DC via Port USB_x000D_ _x000D_ Output Current : 3A(MAX)_x000D_ _x000D_ Conversion efficiency :92% (MAX)_x000D_ _x000D_ Switching frequency : 150KHZ_x000D_ _x000D_ Output ripple :30mV (MAX)_x000D_ _x000D_ Working Temperature :industrial (- 40 c to +85 c)_x000D_ _x000D_ Size :43*21*14 mm_x000D_ _x000D_ The input volts should less than 55v _x000D_ _x000D_ When adjust the blue potentiometer ,please use a multimeter to monitor thevoltage_x000D_ _x000D_ Rotating Clockwise can rise the voltage while rotating counterclockwise could lower the voltage_x000D_ _x000D_ When the module output voltage can not be adjusted (the output voltage is always equal to the input voltage )Please adjust the potentiometer counterclockwise 20 laps (20 turns) or more till it works._x000D_ _x000D_ The image is for illustration ,real color may different
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