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LM2596 DC-DC Adjustable Buck Converter Module 4.0~40V to 1.25~37V Power Supply with LED Display

Regular price $35.00

Parameters: 
Output Voltage: DC 1.25~37V(continuously adjustable) 
Input Voltage: DC 4~40V(the input voltage should be higher than output voltage at least 1V) 
Output Current: 2A(for stable operation), 3A max. 
Voltmeter Accuracy: .+/-0.1V 
Length 76mm* width 45mm
It adopts the internal oscillation frequency of 150KHz.

Note:
Short press the button can switch the voltage display between input and output, red LED lights on when testing input voltage and green LED lights on when testing output voltage.

How to adjust accuracy of input/output volt? 
(1)Output voltage calibration 
Firstly, adjust the right button so that "OUT" LED lighted, the voltmeter shows the value of output voltage; Press the right button for more than 2 seconds, 
release, voltmeter and "OUT" LED flashes in synchronization so that you enter the output voltage calibration mode. 
Secondly, 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, so you need to continuously press 1-5 times to see the voltmeter change 0.1V, how many times voltmeter change 0.1V by pressing the key, depending on the current display voltage, the higher the voltage, the fewer the number of press. 
Thirdly, press the right button for more than 2 seconds, release, to exit the output voltage calibration mode. All parameters set to automatically power down to save. 
(2) Input voltage calibration 
Firstly, 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 voltage calibration mode. 
Steps 2 and step 3 are consistent with the output voltage calibration method.