[thePunderWoman]

Summary

Routes the V2 BT840XE board and adds production files in PCB/v2.x/production, using V1's folder layout. The board has 0 DRC violations and 0 unconnected items.

What changed

• Routing: F.Cu and B.Cu carry signals, In2 is a solid ground plane, and In1 carries signals with a partial 3V3 fill.
• BUCK_FB: 17.6 mm on the top layer only, kept out from under the inductor.
• Hall sensor: only its own supply, ground and signal are within 2 mm.
• Pin swap: BTN_MACRO4 moved from P0.21 (E2) to P1.11 (Z0), because E2 had no escape route and Z0 sits beside the button.
• Copper removed: 8 dead-end stubs from the original copper, all with their nets still complete.
• Fiducials: six, three per side, placed asymmetrically.
• Silkscreen:
  • Snips logo at 80% on the bottom
  • Regenerated QR code on the bottom, same URL as V1
  • V2.0 text on the top, between the macro rows
  • R2 Builders mark on the top

Testing

• stackup check and BOM export pass.
• DRC has 0 violations and 0 unconnected items, and the PCB sync check is clean.
• latch_sim.py passes.
• The 76 assembled parts match Stackup's BOM, with no blank or mismatched LCSC numbers.
• The Gerber outline is 30 x 70 mm.
• The QR code decodes from a rendered image, not yet from a printed board.

Open before fab

• BT840XE shows 0 stock at JLC. Mouser and DigiKey have thousands, so the plan is to supply them to the assembler.
• Check part rotations in the assembler's preview, especially U_MCU1, U_IMU1, U_CHG1, U_HALL1 and D_RGB1.
• Compare the module footprint with Fanstel's land pattern.
• Bench test coupling between the hall sensor, trigger magnet and stick.
• Confirm Nordic's values for USB and VBUS.
• Check the fab's silkscreen minimum against the 0.19 mm QR squares.
• USB D+ and D- differ by 14.5 mm, about 0.1 ns. That should be fine at full speed, and it's accepted for now.

Regenerate the production files after any further board change.

🤖 Generated with Claude Code