This is a 20W adjustable DC-DC buck converter module with a digital display. It is based on LM2596 3A step-down voltage regulator and supports input of 0~40V DC with an accuracy of ±0.05V.
On a regular buck converter, there is no display and you have to measure the output manually with a multimeter which can be slow and inefficient. This buck converter has a display with the output voltage readout integrated into the board. You can change the output by adjusting a screw potentiometer that is also integrated into the board. Simple!
This module can be used in DC applications such as batteries, power transformers, DIY adjustable power supplies, 24V vehicle power supplies, industrial equipment, 12V to 3.3V, 12V to 5V, 24V to 5V, 24V to 12V, 36V to 24V and so on.
Please note that the potentiometer can sometimes be set a little high in the factory and may need a lot of anti-clockwise turns to get it to start dropping the voltage. Once you have it set around that correct area, it'll work just fine!
Note: Wires/connectors not included
Self-Calibration
The onboard voltage meter supports self-calibration mode. You only need to calibrate it once and the value will be stored automatically. The method is as follows:
- Hold the button for 3 seconds. Release the button to enter input voltage calibration mode (“IN” is ON) ; Hold the button for 3 seconds and release the button to enter output voltage calibration mode (“OUT” is ON); hold the button for 3 seconds, and release the button to exit calibration mode, all parameters will be saved automatically
- In calibration mode, click the button to adjust the value
