Do not apply more than 5.5V to pins 1 or 2. The "VCC" is an output from the power module, not an input.
| Pin | Signal | Pin | Signal | | :--- | :--- | :--- | :--- | | 1 | PWM 9 (AUX 1) | 2 | PWM 10 (AUX 2) | | 3 | PWM 11 (AUX 3) | 4 | PWM 12 (AUX 4) | | 5 | PWM 13 (AUX 5) | 6 | PWM 14 (AUX 6) | | 7 | NC | 8 | NC |
The board features dual-redundant power inputs with an integrated ideal diode system for automatic failover. The physical connector used is a . Pixhawk Overview — Copter documentation - ArduPilot pixhawk 2.1 pinout
The Pixhawk 2.1 does have a built-in power distribution. If your ESCs have BECs (Battery Elimination Circuits), you must remove the red (+5V) wire from all but one ESC. Otherwise, you will create a ground loop or burn the flight controller.
| Port | Pins | Signal | Function | |------|------|--------|-----------| | | 1 | VDD 3.3V | Debug power | | | 2 | SWDIO | Data | | | 3 | SWCLK | Clock | | | 4 | GND | Ground | | USB OTG | Micro-B | D+, D-, ID, GND, VUSB | Firmware flashing, MAVLink console | | SPI (6 pins) | CS, SCK, MISO, MOSI, 3.3V, GND | External SPI (rarely used) | For custom sensors | Do not apply more than 5
DEBUG/SWD: [####]
Have a specific wiring question? Leave a comment below or visit the discussion forum linked above. The physical connector used is a
The 3.3V on pin 8 is limited to 250mA. Do not power a high-draw GPS from this pin.