PCB & Gerber Files

The PolyKybd uses two 4-layer PCBs (left and right), each 1.6mm thick. The PCBs contain a large number of fine-pitch SMD components including the RP2040 microcontroller and 72 FPC sockets, so ordering pre-assembled PCBs is strongly recommended.

Gerber files

The latest gerber files, BOM, and pick & place files are in the PolyKybd hardware repo:

File	Description
poly_kybd/Gerber/PCB/left-side-v3.1/gerber-left-side-v3.1-08.01.2024.zip	Left PCB gerbers
poly_kybd/Gerber/PCB/right-side-v3.1/gerber-right-side-v3.1-08.01.2024.zip	Right PCB gerbers

Aluminum plates

The key plates are also ordered as PCBs — specify 1.2mm aluminum when ordering:

File	Description
poly_kybd/Gerber/Plate/gerber-left-side-v3-17.11.2023.zip	Left aluminum plate
poly_kybd/Gerber/Plate/gerber-right-side-v3-17.11.2023.zip	Right aluminum plate

Ordering from JLCPCB

JLCPCB is one convenient option that supports both PCB assembly and aluminum PCB orders.

1. Upload the gerber ZIP for the PCB
2. Select 4-layer, 1.6mm thickness
3. Enable PCB Assembly and upload the BOM and CPL (pick & place) files from the Gerber folder
4. If the fab offers a parts orientation verification step, use it — part orientation in KiCad may differ from the fab’s default

Caution

If you modify the PCB in KiCad and re-export gerbers, double-check that the hot-swap sockets are on the back side. The KiCad footprint places them on the front by default, which is incorrect for manufacturing.

KiCad source files

The full KiCad 7 projects are in the repo if you want to make your own modifications:

• poly_kybd/poly_kb_wave_right2.kicad_pro — Right PCB
• poly_kybd/poly_kb_wave_left2.kicad_pro — Left PCB
• poly_kybd/poly_kb_wave_right2_plate.kicad_pro — Right plate
• poly_kybd/poly_kb_wave_left2_plate.kicad_pro — Left plate

See Hardware & PCB Modification for more on working with the KiCad sources.