Here's the comparison of the three attributes you asked about:
| Product | Power Input | USB Ports | Weight |
|---|---|---|---|
| ARK Just A Jetson | 5.5–75 V (direct battery input) | 3 | 75 g |
| Holybro Pixhawk Jetson Baseboard | 7–21 V | 4 | 203.2 g |
Key differences:
- Power input: The ARK board accepts a much wider input range, up to 75 V, allowing direct battery connection without a separate regulator. The Holybro board's range of 7–21 V covers typical 2S–4S setups but not higher-voltage battery systems.
- USB ports: The Holybro baseboard has 4 USB ports to the ARK board's 3.
- Weight: The ARK board is significantly lighter at 75 g versus Holybro's 203.2 g — relevant for payload-sensitive drone builds.
Both are carrier boards for Jetson Orin NX/Nano modules and both offer HDMI, CAN bus, dual M.2 slots, 2 MIPI camera connectors, and Wi-Fi/BT connectivity. The ARK board is NDAA-compliant and US-made, while the Holybro board uses the Pixhawk Autopilot Bus (PAB) mounting standard, letting it pair directly with a PAB flight controller such as the Pixhawk 6X.