ITEM NAME:USB Step UP/Down Power Supply Module Adjustable Boost Buck Converter RFU KIV Descriptio n Description: Function Description: 1. Button “SELECT†button: short press – switch between voltage, current, power, wheel display; long press – enter or exit calibration mode; “ON/OFF†button: Short press – control the output end to be turned on or off; long press – set the power-on default output to be off or on, long press for more than 3s to release, display ON for each power-on default There is an output, and the display OFF means that there is no output by default every time the power is turned on. 2. Potentiometer knob The current adjustment potentiometer CC rotates clockwise to increase the limit current value. When the load current reaches the limit current, it enters the constant current state (note that the output current can be increased without adjusting the potentiometer. At constant voltage, the output current is only Depending on the load, it varies according to the load); Maximum output current (constant current value) setting method: switch to current display, directly short-circuit the output terminal to adjust the CC potentiometer, the current display current value is the maximum output current. The voltage adjustment potentiometer CV rotates clockwise to increase the output voltage. 3. Indicator light CCâ€â€Ã¢â‚¬â€Constant current indicator light, bright when constant current (red); ON - output status indicator (green); 4. Input and output ports The input side - the left side, the USB male head, the microUSB, and the pad are selected as inputs; Output - right side, blue 2P terminal as output. 5. Accuracy calibration method: Output voltage calibration - When the digital tube always displays the voltage, press and hold the "SELECT" button for more than 3 seconds to release, the digital tube flashes, short press the "SELECT" button, the voltage value increases by one unit, short press the "ON/OFF" button The voltage value is reduced by one unit. When the outpu.1 USB Boost Line 5V To 9V12V24V Adjustable Boost Module Without Housing. ON - output status indicator (green);. The input side - the left side, the USB male head, the microUSB, and the pad are selected as inputs;.