PCB Design for Arduino Mega
Worked for 34 sec
Actualizado: la alimentación queda definida como USB hacia el Arduino Mega, y el shield toma 5V/3.3V desde los headers del Mega;
VIN queda intencionalmente sin usar.Archivos actualizados:
Siguiente paso recomendado: pasar al layout del shield y definir la forma/contorno compatible con Arduino Mega.
SPLIT ONE CONECTOR PER MOTOR
Thought for 4 sec
Entendido. Voy a separar el conector actual de motores en dos conectores independientes: uno para motor izquierdo y otro para motor derecho, manteniendo las mismas señales del pinout.
Worked for 2 mins
He separado la interfaz de motores en dos conectores:
- J1 = motor izquierdo: PWM, DIR, BRAKE, STOP, HALL_LEFT, GND.
- J2 = motor derecho: PWM, DIR, BRAKE, STOP, HALL_RIGHT, GND.
También coloqué J2 junto a J1 en el layout y actualicé la Project Specification. Queda listo para continuar con placement/routing.
Layout, DRC, update docs
Start PCB placement
Run ERC/DRC
Update connector pinout
Check manufacturability
Refine this doc
Ask about this doc
Board Bring-Up Plan — Arduino Mega Motor Sensor Shield
Prerequisites
- Equipment: multimeter, USB power for Arduino Mega, oscilloscope or logic analyzer, serial monitor.
- Power source: USB into the Arduino Mega; do not apply power to VIN for normal operation of this shield.
- Start with motor drivers disconnected from high-current motor power.
- Verify common GND between Arduino Mega, shield, ZS-X11H drivers, ACS712 modules, GPS and IMU.
1. Visual Inspection
- Check shield headers align with Arduino Mega.
- Confirm ACS712, GPS and MPU connections are oriented correctly.
- Verify the GPS RX divider R3=10kΩ / R4=20kΩ is populated.
2. Power Rail Verification
Table
| Rail | Source | Expected | Measure At | Pass Criteria |
|---|---|---|---|---|
| USB 5V | Arduino Mega USB | 5.0 V | Mega USB/5V header | 4.75–5.25 V |
| 5V | Arduino Mega 5V header from USB | 5.0 V | ACS712 VCC pins | 4.75–5.25 V |
| 3V3 | Arduino Mega 3.3V | 3.3 V | MPU VDD/VDDIO, GPS VCC | 3.14–3.47 V |
| GND | Arduino Mega GND | 0 V | J1 GND pins | <0.1 Ω continuity |
3. Interface Verification
Table
| Interface | Expected Test |
|---|---|
| I2C MPU-9250 | I2C scan should detect 0x68. |
| GPS NEO-6M | Serial2 at 9600 baud should receive NMEA sentences. |
| ACS712 right/left | A3/A4 should read near mid-scale at zero current. |
| Hall left/right | D18/D19 interrupt counts should change when Hall pulses are applied. |
| ZS-X11H signals | D46/D44 PWM and DIR/BRAKE/STOP should toggle at J1 before connecting drivers. |
4. Safety Notes
- Do not route motor phase/current paths through the shield unless the PCB is redesigned for high current.
- Keep Arduino logic GND tied to driver signal GND.
- Test PWM outputs with wheels unloaded before driving the motors.
Pass/Fail Summary
Table
| Section | Result | Notes |
|---|---|---|
| Visual inspection | [ ] Pass / [ ] Fail | |
| Power rails | [ ] Pass / [ ] Fail | |
| GPS | [ ] Pass / [ ] Fail | |
| IMU | [ ] Pass / [ ] Fail | |
| Current sensors | [ ] Pass / [ ] Fail | |
| Motor driver signals | [ ] Pass / [ ] Fail |
Prerequisites
1. Visual Inspection
2. Power Rail Verification
3. Interface Verification
4. Safety Notes
Pass/Fail Summary
