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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Project Specification — Smart Tee Marker Robot Controller
Project Overview
Status: Draft schematic implementation in progress.
A 2-layer controller PCB for a self-driving tee marker robot. The board integrates a BU01 UWB-ranging module socket, ESP32-WROOM-32 Wi-Fi uplink subsystem, dual DC motor driver, status LEDs, sensor headers, and a single-cell Li-ion charging/boost power system.
Intended Use
Prototype/validation controller for an autonomous tee marker robot powered by a protected 18650 Li-ion cell and charged over USB-C.
What the Device Should Do
- Charge a single-cell Li-ion battery from USB-C.
- Generate independent 5V_MOT and 5V_LOGIC rails sharing GND only.
- Provide 3V3 for ESP32, logic, LEDs, and sensor connectors.
- Host the BU01 UWB module as a pluggable 2-row socket.
- Use ESP32-WROOM-32 for Wi-Fi uplink and USB-UART programming.
- Drive two DC motors with L293D and firmware-compatible 74HC595 direction interface.
- Expose IR and I2C/IMU sensor headers.
- Provide status LEDs and test points for key rails.
Main Features
- USB-C Li-ion charging input.
- USB-C ESP32 programming/bring-up input.
- Battery master switch after charger/battery node.
- Dual MT3608 boost rails: 5V_MOT and 5V_LOGIC.
- AMS1117-3.3 3V3 rail.
- BU01 module socket with UWB antenna keepout.
- ESP32-WROOM-32 module with antenna edge overhang requirement.
- L293D dual H-bridge and two motor connectors.
- Two 74HC595 shift-register subsystems.
- Four M3 mounting holes.
System Architecture
Power source: USB-C charger and 18650 battery feed switched V_BAT. V_BAT feeds two independent boost converters. Logic boost feeds LDO and low-power logic; motor boost feeds H-bridge only through a pi filter.
Hardware Subsystems
- Power/charging: J_CHG, IP2312 charger, J_BAT, master switch, bulk V_BAT capacitance.
- Motor power: MT3608 boost to 5V_MOT plus ferrite/capacitor pi filter.
- Logic power: MT3608 boost to 5V_LOGIC and AMS1117-3.3 to 3V3.
- UWB host: BU01 module socket only; STM32F103/DW1000 remain inside module.
- Wi-Fi: ESP32-WROOM-32 with CH340C/CP2102N programmer and auto-reset.
- Motor control: 74HC595 direction register plus L293D H-bridge.
- UI/status: 8 LEDs driven by 74HC595 and rail indicators.
- Sensors: KY-032 IR header and I2C/IMU header without added I2C pull-ups.
Interfaces and Connections
- USB-C charge input: 5V VBUS, GND, independent 5.1k CC pull-downs.
- USB-C ESP programming: VBUS bring-up path, USB D+/D-, GND, CC pull-downs.
- Battery connector: BAT+, BAT-.
- BU01 socket: V5, V3.3 tap, GND, UART, PWM, shift-register, IR, I2C, IMU_INT nets.
- ESP32: UART0 to USB-UART, UART2 to BU01.
- Motors: J_M1 and J_M2 2-pin outputs.
- Sensors: J_IR and J_I2C.
Power and Runtime Expectations
Battery: one protected 18650 Li-ion cell, 3.0–4.2V operating range, 3.7V nominal. Runtime depends strongly on motor current and Wi-Fi duty cycle.
Power Tree and Power Budget
Preliminary sizing targets before datasheet finalization:
- 5V_MOT: L293D motor supply only. Design for up to ~1.2A continuous / 2A peak if using small DC gearmotors; actual motor stall current must be confirmed.
- 5V_LOGIC: BU01 module, USB-UART/logic, sensors, 3V3 LDO input. Estimate ~700mA peak load allowance.
- 3V3: ESP32 Wi-Fi peaks up to ~500mA, shift registers/LEDs/sensors ~80–120mA depending LED duty.
- V_BAT worst-case boost input current must be calculated at 3.0V: Iin = Pout/(Vin_min*efficiency). With 5V_MOT=2A peak and 5V_LOGIC=0.7A peak at 85% efficiency, battery pulse current can exceed 5A. This requires high-current switch/connector/traces and confirms the 1000uF V_BAT bulk capacitor requirement.
Manufacturing and Assembly Expectations
2-layer, 1.6mm FR4, 1oz copper. Minimum track/clearance 0.20mm, minimum via 0.40/0.80mm. Wider traces for V_BAT, 5V_MOT, and motor outputs. SMD default unless a concrete part only exists through-hole.
Firmware-Relevant Hardware Requirements
- BU01 STM32 pins provide the main robot-control signals.
- ESP32 UART2 links to BU01 on GPIO16/GPIO17.
- ESP32 UART0 is wired to USB-UART for programming.
- EN/BOOT buttons and auto-reset support flashing.
- Motor directions controlled by 74HC595; motor speeds controlled by BU01 PWM pins.
Physical Design Expectations
Target board outline: ~100mm x 80mm. BU01 antenna edge requires 25mm x 15mm no-copper/no-trace keepout. ESP32-WROOM antenna must face outward and overhang board edge. Bottom-layer GND pour with star-tie near J_BAT; motor return must avoid BU01 antenna keepout.
Important Design Decisions
- BU01 is socketed as a module; no discrete STM32F103/DW1000/RF design.
- ESP32 is module-level WROOM-32, not bare RF chip.
- Motor and logic 5V rails are independent boost outputs sharing only GND.
- No extra I2C pull-ups are added because BU01 module pull-ups are assumed present.
Assumptions / Items Requiring Confirmation
- Motor stall current is not specified; power path will be conservatively sized and flagged for confirmation.
- BU01 user photos show the NodeMCU BU-01 carrier uses a 2x18, 2.54mm dual-row header/socket footprint, so J_BU01 has been updated from the earlier 2x12 placeholder to a 2x18 socket.
- BU01 exact silkscreen-label-to-pin-number order still requires confirmation from a measured pinout/photo orientation before manufacturing; current schematic preserves the previous logical net assignment and marks extra pins no-connect.
- IP2312 availability/pinout in the library must be confirmed; otherwise an equivalent charger may need approval.
- MT3608 module/IC footprint availability must be confirmed; external component values follow datasheet application circuit.
Change Notes
- Initial requirements captured from Integrated v0.2 design prompt.
- BU01 socket corrected to 2x18 2.54mm based on user-provided NodeMCU BU-01 photos; exact pin-label order remains a manufacturing checkpoint.
Project Overview
Intended Use
What the Device Should Do
Main Features
System Architecture
Hardware Subsystems
Interfaces and Connections
Power and Runtime Expectations
Power Tree and Power Budget
Manufacturing and Assembly Expectations
Firmware-Relevant Hardware Requirements
Physical Design Expectations
Important Design Decisions
Assumptions / Items Requiring Confirmation
Change Notes
