Aideepen | LM2596 DC Step Down Converter Voltage Regulator 4.0~40 to 1.25-37V Buck Adapter LED Display Voltmeter Adjustable Power Supply

Features:Input Voltage Range: DC 4-40VOutput Voltage Range: 1.25-37VDC adjustableOutput Current: 2AVoltmeter Range: 0-40V, accuracy ±0.1VInput reverse polarity protectionBuilt-in output short-circuit protectionIntegrated thermal shutdown functionProduct Parameters:Input Voltage Range: DC 4-40VOutput Voltage Range: 1.25-37VDC adjustableOutput Current: 2AVoltmeter Range: 0～40V, error ±0.1VInput reverse polarity protectionBuilt-in output short-circuit protectionIntegrated thermal shutdown functionLength x Width x Height = 6.13.41.2cmLED Digital Voltmeter Tube, Adjustable Accuracy. You can calibrate it to match your adjustable multimeter's precision.Press the right button to display input or output voltage. When the right “OUT” LED shows output, the left “IN” LED displays input. How to adjust accuracy?(1) Output Voltage Calibration ProcedureStep 1: Press the right button to illuminate the “OUT” LED, displaying the output voltage value. Hold the right button for over 2 seconds, then release. The voltmeter and “OUT” LED will flash synchronously, entering output voltage calibration mode.Step 2: Press the right button (at normal speed) to increment the voltage value by one unit; press the left button to decrement by one unit. Since one unit is less than 0.1V, the minimum voltage display is 0.1V. Therefore, press the button 1-5 times consecutively to observe a 0.1V change in the voltmeter. The number of button presses required for a 0.1V change depends on the current displayed voltage—higher voltages require fewer presses.Step 3: Press and hold the right button for over 2 seconds, then release to exit output voltage calibration mode. All set parameters will automatically save upon release.(2) Input Voltage Calibration StepsStep 1: Adjust the right button until the “IN” LED illuminates and the voltmeter displays the input voltage value. Press and hold the right button for over 2 seconds, then release. The voltmeter and “IN” LED will flash synchronously, entering input voltage calibration mode.Steps 2 and 3 follow the same procedure as the output voltage calibration method.Note:Some customers report: “The module cannot be adjusted; the output voltage always equals the input voltage.” If encountering this issue, rotate the potentiometer counterclockwise more than 10 turns to adjust the output voltage. The factory default output voltage is 20V.Shipping List:1 x LM2596 Buck Power Supply Module