Cff (10nF) placed across R1
: Summary and final thoughts.
If you already have a stock module, here are the "better" modifications (schematic rework): wxdc12003 schematic better
The WX-DC12003's output is not pure DC; it contains some switching noise and ripple. While the datasheet claims "low ripple", for sensitive loads like audio codecs, ADCs, or radio frequency circuits, you may need more. Cff (10nF) placed across R1 : Summary and final thoughts