Specification Input Voltage: 2.5 - 40V Output Voltage: 1.25 - 37V Output Current: 3A Conversion Efficiency: 92 Percent Output Ripple: Less Than 30mV Switching Frequency: 150KHz Operating Temperature: -45 - +85 Degrees Celsius Place of Application: - This module can be applied in the input voltage higher than the output voltage step-down field, such as: Battery, power transformer, DIY adjustable voltage power supply, Laptop Power Supply. - Industrial equipment step-down. Features: - With voltmeter display, voltmeter can be self calibrated. Voltmeter error +0.1V, range 0 - 40V. - Touch the key to switch the measured input or output voltage, and an indicator light shows which voltage is being measured. The default digital tube displays the input voltage, and the input indicator light is on. Touch the key lightly, the output voltage is displayed by breaking code, and the output indicator lights up. And keep the settings, even when the power is off and then on. - The voltmeter can be closed, long press the switch for more than 1 second and less than 4 seconds, then release the hand to close. After the voltmeter is closed, simply press the switch to open the voltmeter. - Input and output voltage measurement error calibration function. Press and hold the switch for more than 4 seconds, and then release the switch to enter the voltage measurement error calibration function. At this time, the "IN" light is on (calibration input terminal), and the nixie tube flashes to display the correction value (factory parameter is 0.0). At this time, press the key briefly to change the value (the value range is - 0.5 - 0.5V). A positive number means upward calibration, and a negative number means downward calibration. At this time, the "OUT" light is on (calibrate the output terminal), and the calibration value of the output terminal is displayed. The adjustment method is the same as that of the input terminal. After ad
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