Macropad Design Files
Worked for 2 mins 6 sec
Thought for 5 sec
Referenced guidance.
Thought for 13 sec — Delegating task execution
Thought for 2 sec
Thought for 1 sec — Executing skills workflow
Thought for a moment — Executing skills workflow
Referenced guidance.
Thought for 3 sec
Thought for 3 sec — Inspecting schematic components
Thought for a moment — Inspecting schematic components
Read schematic.
Read layout.
Reading layout for ENC1, U1.
Read BOM.
Read schematic.
Reading schematic for ATmega32U4.
Thought for 10 sec
Read KEY6_D7_PE6, KEY8_D9_PB5, ENC_SW_D16_MOSI_PB2 and 24 more.
Read layout.
Reading schematic for LED1, C11, R7.
Reading layout for LED1, C11, R7 and 2 more.
Thought for 3 sec
Thought for 4 sec
Thought for 3 sec — Evaluating LED placement
Thought for a moment — Evaluating LED placement
Wired pins.
Thought for 9 sec
Baking PCB layout data.
Placing 49 components.
Thought for 2 sec
Thought for 6 sec
Moved 3 component(s)
Thought for a moment
Flux stopped
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STEP Mechanical Alignment Notes
Source files
Case-v3_002302.stepLid_002330.step
Coordinate convention used
- STEP XY coordinates were converted to PCB layout coordinates by using the USB/grid-centered datum:
- STEP datum X0 = 43.970 mm
- STEP datum Y0 = 41.751 mm
- PCB coordinate = STEP coordinate - datum
- This keeps the USB-C opening centered at PCB X = 0 and aligns the extracted MX grid to a 19.05 mm pitch.
Board outline applied
- Applied PCB outline: rounded rectangle, 89.0 mm × 83.6 mm, 3.0 mm corner radius.
- This is a fit outline derived from the case/lid extents and slightly expanded from the first extracted pocket so the actual hotswap and encoder footprints are not clamped by the board boundary.
- Routing remains deferred.
Mechanical anchor extraction
MX switch grid
The STEP geometry contains a regular MX-style 19.05 mm grid with nominal cutout centers:
Table
| Column | STEP X (mm) | PCB X (mm) |
|---|---|---|
| C1 | 15.523 | -28.447 |
| C2 | 34.573 | -9.397 |
| C3 | 53.623 | 9.653 |
| C4 | 72.673 | 28.703 |
Table
| Row | STEP Y (mm) | PCB Y (mm) |
|---|---|---|
| Top | 53.604 | 11.853 |
| Middle | 34.554 | -7.197 |
| Bottom | 15.504 | -26.247 |
Applied 11-key assignment
Updated per the user's reference photo: 3 switches on the top row, encoder at upper-right, then 4 switches on the middle row and 4 switches on the bottom row.
Table
| Component | PCB X (mm) | PCB Y (mm) |
|---|---|---|
| SW1 | -28.447 | 11.853 |
| SW2 | -9.397 | 11.853 |
| SW3 | 9.653 | 11.853 |
| SW4 | -28.447 | -7.197 |
| SW5 | -9.397 | -7.197 |
| SW6 | 9.653 | -7.197 |
| SW7 | 28.703 | -7.197 |
| SW8 | -28.447 | -26.247 |
| SW9 | -9.397 | -26.247 |
| SW10 | 9.653 | -26.247 |
| SW11 | 28.703 | -26.247 |
The top-right MX cutout is left unpopulated because the encoder occupies the upper-right position in the reference layout.
Encoder
- User-provided reference photo (2026-07-21) shows the encoder at the upper-right of the key cluster.
- Right circular lid/case opening center extracted at approximately STEP (76.824, 68.351) mm.
- Applied encoder position: ENC1 = (32.854, 26.600) mm.
USB-C
- USB-C case opening extents include X ≈ 39.370 to 48.570 mm and Y ≈ 82.501 to 85.101 mm.
- Opening center X ≈ 43.970 mm, aligned to PCB X = 0.
- Applied J1 position: (0.000, 35.680) mm, rotation 180°, with the connector mouth toward the top edge.
Verification status
- The exact requested mechanical anchors have been read back after mutation:
- SW1–SW11 are on the STEP-derived MX grid in the 3+4+4 layout.
- ENC1 is on the right circular encoder opening.
- J1 is centered to the USB-C opening and rotated toward the top board edge.
- No component-outside-board, component-body-overlap, overlapping-copper, or ground-return-loop checks are currently reported for the selected review set.
- Airwires remain intentionally unresolved because routing is deferred until the mechanical placement is approved.
Open mechanical assumptions
- The case provides a 4×3 MX grid but the electrical design has 11 switches plus one encoder. The current assignment intentionally leaves the top-right MX cutout unpopulated and uses the right circular opening for the encoder, matching the user's photo.
- ENC1 uses a PEC11R/EC11-style substitute footprint. A final physical fit check against the actual encoder part and knob height is still required before manufacturing.
Source files
Coordinate convention used
Board outline applied
Mechanical anchor extraction
MX switch grid
Applied 11-key assignment
Encoder
USB-C
Verification status
Open mechanical assumptions
