Specifications
Input Voltage: DC 3V-40V
Output Voltage: DC 1.5V-35V (adjustable)
Output Current: 3A (MAX)
Conversion Efficiency: 92% (max.)
Switching Frequency : 65KHz
Rectification: non-synchronous rectification
Module Property: non-isolated buck module
Operating Temperature: -45℃ to +85℃
Load Regulation: ± 0.5%
Voltage Regulation: ± 2.5%
Size: approx. 6.6x3.9x1.8cm/ 2.6x1.5x0.7in
Weight: 21g
Thickened circuit boards Short circuit and over-temperature protection tested, sealed in anti-static packaging

How to Use
1.Press the button in a short time( 1 second) so that“in”LED lighted, the voltmeter shows the value of input voltage
2.Press the button in a short time( 1 second) again so that“out”LED lighted, the voltmeter shows the value of output voltage
3.Rotate the top screw of potentiometer clockwise to boost the value of the output voltage, anti clockwise to reduce it

How to Calibrate the Digital Tube Voltmeter
1. Short press the left "ON/OFF" button to start up the digital tube voltmeter. Long press(>1s, 2. Long press(>4 seconds) the left button to enter self-calibration of voltage measurement(calibration range: -0.5-0.5V, factory setting is 0.0) IN indicator lights = input voltage measurement calibration starts. Then, long press(>2 seconds) the right "Mode" button, "OUT" indicator lights = output voltage measurement calibration starts Tap the left / right button to reduce / rise by one unit (since the voltage value of one unit is less than 0.1V, you need to 1-5 times tap the button continuously, so that the voltmeter can change by 0.1V)
3. After calibration, long press(>2 seconds) the right "Mode" button to preserve the adjusted value(no loss with outage) and back to normal voltage display

Package List: 4 x LM2596 Buck Converter Module