5pcs DC5V to 3.3V 9V 12V 18V 24V USB Adjustable Buck Boost Power Supply Module Voltage Regulator

Instructions for use 1 Button ON button on the left side short presscontrol the output terminal to turn on or off in the calibration mode reduce the voltage or current value of one unit long presslong press for more than 3s to release the digital tube is closed press any button The digital tube resumes display Right side SW button Short press switch between voltage current and wheel display long press enter or exit calibration mode enter calibration voltage at the display voltage interface and calibrate current when entering current interface 2 Potentiometer knob Clockwise rotation increases the output voltage and counterclockwise rotation reduces the output voltage The stepless conversion voltage range is 1 2 24V 3 Indicator light VThe indicator light indicates that the current digital tube displays the voltage value and the unit is V AThe indicator light is on indicating that the current digital tube displays the current value the unit is A 4 Input and output ports The input terminal the left side the USB male head the microUSB and the pad are selected as inputs and the input range is 3 5 12V Output right side blue 2P terminal as output output range 1 2 24V 5 Calibration method Output voltage calibration When the digital tube always displays the voltage press and hold the SW button for more than 3 seconds to release the digital tube flashes short press the SW button the voltage value increases by one unit short press the ON