: Reduced idle power consumption, extending battery life for portable applications. Improved Trace Shielding

| Area | Possible Change | |------|----------------| | | Adjusted matching network for improved BLE range. | | Power regulation | Added ferrite beads / LC filters to reduce ripple from LDO. | | Decoupling caps | Moved 0.1µF caps closer to IC power pins. | | USB interface | Pull‑up / pull‑down resistor changes on D+/D− lines. | | Button / LED routing | Re‑routed GPIO traces to avoid crosstalk. | | Test points | Added TP for current measurement or firmware flashing. | | Ground plane | Stitched vias near antenna to reduce EMI. |

For Elias, the desk was a graveyard of prototypes. But in the center, gleaming under the warm LED of his workspace, sat the —the heart of his custom macro-pad project.