PCB Design for Smart Tee Marker Robot
내가 공유한 사진에도 있듯이 이 2*18 핀이 저렇게 붙어있지 않아. 두 핀들 사이의 간격이 13핀 만큼 떨어져 있어.
Thought for 8 sec
맞습니다. 사진의 NodeMCU BU-01은 2×18 ‘좁은 듀얼로우’가 아니라, 1×18 헤더 두 줄이 넓게 떨어진 NodeMCU 스타일입니다. 현재 단일 2×18 소켓을 두 개의 1×18 소켓으로 바꾸고, 행 간격을 약 13핀 피치(≈33 mm) 기준으로 배치하겠습니다.
Thought for 12 sec
맞습니다. 제가 방금 확인한 내용대로, 현재 보드의
J_BU01은 아직 단일 2×18 좁은 듀얼로우 소켓 기준이라서 사진 속 NodeMCU BU-01 보드와 맞지 않습니다.현재까지 완료된 상태:
- 기존 2×12 BU01 소켓은 2×18 소켓으로 바꿨습니다.
- 하지만 사용자가 지적한 것처럼, 이건 여전히 “두 줄이 붙어 있는 2×18” 형태입니다.
- 사진 속 BU-01은 1×18 핀헤더 두 줄이 넓게 떨어져 있는 구조입니다.
- 두 줄 사이 간격은 사용자가 말한 대로 약 13핀 피치 ≈ 13 × 2.54 mm = 33.02 mm로 봐야 합니다.
남은 수정 작업:
- 현재
J_BU01단일 2×18 소켓 제거 J_BU01_L,J_BU01_R같은 1×18 female socket 2개로 교체- 두 소켓 사이 중심 간격을 약 33 mm로 배치
- 기존 BU01 신호들을 새 좌/우 소켓 핀으로 재배선
- BU01 사진 기준으로 핀 라벨 방향 재확인
- ERC 및 레이아웃 검토 재실행
중요: 지금은 실행 크레딧이 소진되어 실제 수정 작업을 더 진행할 수 없습니다. 다음 실행에서 바로 위 작업부터 이어가면 됩니다.
헤더 분리 배치
핀 방향 검증
소켓 재매핑
ERC/DRC 확인
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Board Bring-Up Plan — Smart Tee Marker Robot Controller
Prerequisites
- Equipment: current-limited bench supply, multimeter, oscilloscope, USB-C supply/cable, PlatformIO ESP32 programming setup.
- Start with no motors connected.
- Use a protected 18650 cell or current-limited supply emulating the cell.
1. Visual Inspection
- Verify polarity of D_BAT_RP, D_CHG_RP, D_ESP_USB, D_MOT, D_LOG, electrolytic bulk capacitors, LEDs, USB-C connectors, and J_BAT.
- Check U_CHG exposed pad soldering and boost converter diode/inductor placement.
- Confirm BU01 socket orientation and ESP32 antenna edge orientation before assembly release.
2. Power Rail Verification
Table
| Rail | Source | Expected Voltage | Measure At | Initial Current Limit | Pass Criteria |
|---|---|---|---|---|---|
| BAT_RAW | J_BAT / U_CHG BAT | 3.0-4.2 V | J_BAT pin 1 / U_CHG BAT | 100 mA no-load | No short to GND |
| V_BAT | S1 switched battery | 3.0-4.2 V | TP_VBAT | 100 mA no-load | Follows BAT_RAW when S1 ON |
| 5V_MOT | U_BOOST_MOT | 5.0 V | TP_5V_MOT | 300 mA no motor | 4.75-5.25 V no-load |
| 5V_LOGIC | U_BOOST_LOG / USB programmer diode | 5.0 V | TP_5V_LOGIC | 300 mA no-load | 4.75-5.25 V no-load |
| 3V3 | U_LDO | 3.3 V | TP_3V3 | 300 mA no-load | 3.23-3.37 V |
| 3V3_BU01 | BU01 module LDO output tap | 3.3 V nominal | TP_3V3_BU01 | module-only | Present only with BU01 installed/powered |
Procedure:
- Measure resistance from each rail to GND before applying power.
- Apply 3.7 V current-limited input at J_BAT or install a protected cell.
- Turn S1 ON and verify V_BAT, 5V_MOT, 5V_LOGIC, and 3V3 in sequence.
- Check boost ripple on 5V_MOT and 5V_LOGIC with oscilloscope.
- Connect motors only after no-load rails pass.
3. Critical Signal Verification
Table
| Signal | Expected State | Measure At | Notes |
|---|---|---|---|
| ESP_EN | High after RC delay | U_ESP32 EN | Reset button pulls low |
| ESP_IO0_BOOT | High for normal boot | U_ESP32 IO0 | BOOT button pulls low for flashing |
| USB_DP/USB_DN | USB FS activity | U_USB / J_ESP_USB | Check if programming fails |
| ESP_TX/ESP_RX | 3.3 V UART | U_ESP32 GPIO17/16 and J_BU01 | BU01 link |
| M1_PWM/M2_PWM | PWM from BU01 | J_BU01 / U_L293D EN pins | Verify before connecting motors |
4. Connector and Interface Tests
- J_CHG: verify USB-C CC pull-down behavior and 5 V on CHG_5V_IN after D_CHG_RP.
- J_ESP_USB: verify USB enumeration of CH340C and 5V_LOGIC backfeed path through D_ESP_USB.
- J_BAT: verify BAT+ / BAT- polarity before installing cell.
- J_M1/J_M2: verify no motor output short before enabling L293D.
- J_IR: verify 3V3, GND, IR_OUT continuity.
- J_I2C: verify 3V3, GND, I2C_SCL, I2C_SDA, IMU_INT continuity; no local pull-ups were added by design.
5. Programming and Debug Interface
- ESP32 programming path: J_ESP_USB -> U_USB CH340C -> U_ESP32 UART0.
- Flash command:
pio run -t upload. - Monitor command:
pio device monitor -b 115200. - If auto-reset fails, hold BOOT, tap EN, then release BOOT after upload starts.
6. Functional Validation
Table
| Test | Components | Input | Expected Output |
|---|---|---|---|
| ESP32 USB programming | J_ESP_USB, U_USB, U_ESP32 | USB-C cable | ESP32 enumerates and flashes |
| BU01 UART bridge | J_BU01, U_ESP32 | BU01 installed | UART messages visible on USB monitor |
| Status LEDs | U_STAT, LED0-LED7 | BU01 shifts pattern | LEDs toggle through 330 ohm resistors |
| Motor direction | U_MDIR, U_L293D | BU01 shifts direction bits | L293D inputs change state |
| Motor PWM | U_L293D, J_M1/J_M2 | BU01 PWM | Motor outputs switch after motors connected |
| IR header | J_IR | KY-032 module | IR_OUT toggles at BU01 PB1 |
| I2C header | J_I2C | GY-521 module | BU01 sees I2C device |
7. Known Bring-Up Risks / Confirm Before PCB Release
- BU01 exact pin order and mechanical footprint are represented by a generic 2x12 socket and must be confirmed.
- S1 selected library slide switch is not rated for the projected battery/boost pulse current; use a higher-current switch or a MOSFET load switch before production.
- FB1 is a 60 ohm @100 MHz / 3.5 A available ferrite placeholder, not the requested 470 ohm @100 MHz / >=3 A exact part.
- L_MOT and L_LOG are generic 22 uH inductors; production MPN must meet saturation current and low DCR requirements.
- MT3608 motor rail may be insufficient for motor stall currents above its practical switch/current limit.
Pass/Fail Summary
Table
| Section | Result | Notes |
|---|---|---|
| Visual Inspection | [ ] Pass / [ ] Fail | |
| Power Rails | [ ] Pass / [ ] Fail | |
| ESP32 Programming | [ ] Pass / [ ] Fail | |
| BU01 UART | [ ] Pass / [ ] Fail | |
| Motors | [ ] Pass / [ ] Fail | |
| Sensors | [ ] Pass / [ ] Fail |
Prerequisites
1. Visual Inspection
2. Power Rail Verification
3. Critical Signal Verification
4. Connector and Interface Tests
5. Programming and Debug Interface
6. Functional Validation
7. Known Bring-Up Risks / Confirm Before PCB Release
Pass/Fail Summary
