This listing is for a 5A DC-DC adjustable step-down module.

Turn the leftmost (see diagram) bronze screw to change output voltage.  Clockwise increases, anticlockwise decreases.  On first use, you may have to turn it anticlockwise a number of times until the output starts changing.

Turn the rightmost (see diagram) bronze screw to limit the output current.  Clockwise increases, anticlockwise decreases.

Features include:
  • Input voltage: 4 to 38 VDC (do not exceed 38 volts).
  • Output voltage: 1.25 to 36 VDC (adjustable).
  • Output current: 0-5A
  • Output power: 75W
  • Efficiency: Up to 96%
Note that the input voltage must be higher than the output voltage.  This is a step-down converter.