Macropad Design Files
Thought for 13 sec
Eseguo il routing mantenendo tutte le posizioni, rotazioni, layer dei componenti e il bordo esattamente invariati. Il GND non verrà collegato né tramite piano né tramite piste; instraderò solo le connessioni non-GND e verificherò il risultato.
Worked for 5 mins 12 sec
Thought for 11 sec — Executing routing tasks
Referenced guidance.
Thought for 13 sec
Completed 4 design checks — found 46 issues.
Thought for 29 sec
Thought for 6 sec — Considering execution skills
Referenced guidance.
Thought for 3 sec — Inspecting routing state
Checking routing progress.
Completed 4 design checks — found 46 issues.
Thought for 5 sec
Board check: 6 issue(s) found
Reading layout details.
Thought for a moment — Identifying current WS component
Getting a schematic overview for WS2812.
Thought for 9 sec — Identifying airwires and nets
Reading schematic details for LED1.
Reading layout details.
Thought for 40 sec
Reading schematic details.
Flux stopped
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Board Bring-Up Plan — ATmega32U4 Macropad
Prerequisites
- Equipment: multimeter, current-limited USB power meter or bench 5 V supply, oscilloscope if available, ESD-safe tools.
- Firmware: use the @firmware-starter as a first HID test image.
- Safety: first power through a current-limited source. Do not connect directly to a valuable host PC for first power-on.
1. Visual Inspection
- Check U1 ATMEGA32U4-AU orientation and pin-1 marker.
- Check D1–D12 diode orientation against the silkscreen/footprint.
- Check J1 USB-C solder joints for bridges.
- Verify U2 USBLC6-2SC6 orientation.
- Verify F1 PTC, R1/R2/R3/R4/R5/R6, C1–C10, Y1, SW_RESET, SW1–SW11, and ENC1 are populated.
2. Power Rail Verification
Table
| Rail | Source | Expected Voltage | Measure at | Current limit | Pass criteria |
|---|---|---|---|---|---|
| VBUS_RAW | USB-C J1 | 5 V USB | J1 VBUS / F1 pin 1 | 100 mA first power | 4.75–5.25 V present |
| VCC | F1 output | 5 V protected | F1 pin 2, U1 VCC/AVCC/UVCC, C7 | 100 mA first power | 4.75–5.25 V, no overheating |
| GND | USB-C GND | 0 V | J1 GND, U1 GND pins | — | Continuity across GND pour |
Procedure:
- With no power, measure resistance from VCC to GND; investigate if near short-circuit.
- Apply 5 V with 100 mA current limit through USB/power fixture.
- Confirm VBUS_RAW before F1 and VCC after F1.
- Increase current limit only after the rail is stable.
3. Critical Signal Verification
Table
| Signal | Expected state | Measure at | Notes |
|---|---|---|---|
| RESET | High at idle | U1 RESET / R1 / SW_RESET | Press SW_RESET and confirm it pulls low |
| HWB | Low at idle | U1 PE2/HWB / R2 | 10 kΩ pull-down for normal boot behavior |
| XTAL1/XTAL2 | 16 MHz oscillation | Y1 pins or U1 XTAL pins | Use high-impedance probe if available |
| USB D+/D- | Enumerates as USB device | J1/U2/R3/R4 path | Check for bridges before host connection |
4. Connector and Interface Tests
Table
| Interface | Components | Test method | Pass criteria |
|---|---|---|---|
| USB-C | J1, F1, U2, R3, R4, R5, R6 | Connect to current-limited USB host/power meter | Board powers and enumerates after firmware flash |
| Keys | SW1–SW11, D1–D11 | Firmware key scan test | Each switch registers once, no stuck keys |
| Encoder push | ENC1 push, D12 | Firmware key scan test | Push registers as D16 key |
| Encoder A/B | ENC1 A/B | Firmware encoder test | Rotation produces consistent direction events |
| Reset | SW_RESET, R1 | Press reset during USB connection | MCU resets/re-enumerates |
5. Programming and Debug
- Primary programming path: ATmega32U4 USB bootloader over USB-C.
- Recommended first image: simple HID test firmware from the Firmware Starter file.
- If USB bootloader is unavailable, add or expose ISP pads/header in a future revision; the current schematic does not include a dedicated ISP connector.
6. Functional Validation
Table
| Test | Input | Expected output |
|---|---|---|
| USB enumeration | Plug into host | Device appears as Leonardo-compatible/HID device |
| Key scan | Press each key SW1–SW11 | One corresponding HID key event per press |
| Encoder push | Press encoder shaft | One HID key event on D16 mapping |
| Encoder rotation | Rotate clockwise/counterclockwise | Volume up/down or assigned actions |
| Reset | Press SW_RESET | USB disconnect/reconnect or bootloader behavior |
7. Mechanical Validation Before Routing
- Import the case STEP model.
- Align SW1–SW11 hotswap footprints to case switch openings.
- Verify ENC1 matches the actual EC11/PEC11 mechanical opening and knob shaft position.
- Align J1 to the USB-C case cutout.
- Generate the final board outline from the case geometry.
- Lock switch, encoder, connector, and board-outline positions before routing.
Pass/Fail Summary
Table
| Section | Result | Notes |
|---|---|---|
| Visual inspection | [ ] Pass / [ ] Fail | |
| Power rails | [ ] Pass / [ ] Fail | |
| Clock/reset/HWB | [ ] Pass / [ ] Fail | |
| USB programming | [ ] Pass / [ ] Fail | |
| Key/encoder function | [ ] Pass / [ ] Fail | |
| Mechanical fit | [ ] Pass / [ ] Fail | Must pass before routing |
Board status: [ ] Ready for routing after STEP alignment / [ ] Requires schematic or mechanical changes
Prerequisites
1. Visual Inspection
2. Power Rail Verification
3. Critical Signal Verification
4. Connector and Interface Tests
5. Programming and Debug
6. Functional Validation
7. Mechanical Validation Before Routing
Pass/Fail Summary
