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Buck Step-down LM2596 Power Converter Module DC 4.0~40 to 1.3-37V LED Voltmeter
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Imput voltage range 4~40VDC
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Output voltage range 1.25~37VDC ajustable
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Output current 2A
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voltmeter range 0 to 40V Error -0.1V
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Input reverse polanty protection
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Built in output short protection function
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LEDdigital voltmeter tube, the accuracy is adjustable function
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Press the rightkey to let the display show the input or the output voltage.
Output voltage calibration steps
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adjust the right button so that "OUT LED" lighted, the voltmeter shows the value of the output voltage. Press the right button
for more than 2 seconds, release, voltmeter and "OUT LED" flashes in synchronization so that uou enter the output
voltage calibration mode.
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press the right button (normal speed), the voltage value is adding up a unit: Press the left button, minus a unit.
Due to a unit is less than 0.1V, the minimum voltage display to 0.1V
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press right button for more than 2 seconds, release, to exit the output calibration mode. All parameters set to automatically powe down to save.
Input valtage callibration steps
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adjust the right button so that "IN LED" lighted, the voltmeter shows the value of input voltage: press the right button for more
than 2 seconds, release, voltmeter and "IN LED" flashes in synchronization so that you enter the input callibration mode.
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steps 2 and 3 consistent width the output voltage calibration method.
Problem:
The module can not be adjusted, the output voltage is always equal to the input voltage.
Counter clockwise rotation of the potentionmeter 10 laps or more, than you can adjust the output voltage. Factory default outpt voltage is 20V.
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