DJI O4 Air Unit Lite Adapter & Mount

Overview

This is a custom-designed mounting solution to fit the DJI O4 Air Unit Lite into the SpeedyBee Master 3X (or other frames designed for the original DJI O3 Air Unit). The O4 Lite has a different form factor and power requirements than its predecessor, so these parts bridge that gap while adding protection.

The Design

The assembly consists of two 3D-printed frames that sandwich the O4 Lite PCB, held in place by the stock rubber dampers to mitigate vibrations. It also includes a dedicated compartment for the additional voltage converter required to step down power from the flight controller.

Key Features

• O3 to O4 Lite Conversion: Adapts the smaller O4 Lite PCB to the mounting footprint of an O3 unit.

• Heat-Set Ready: The adapter is designed for M2 heat-set threaded inserts for a secure, professional connection to the metal frame.

• Vibration Isolation: Retains the use of rubber fittings to ensure clean, jello-free video footage.

• Integrated Casing: Houses the necessary voltage converter and keeps wiring tidy.

Print Settings

• Material: TPU (Highly recommended for durability and vibration damping) or PLA.

• Infill: 20–30% (Gyroid or Cubic).

• Supports: Minimal supports may be needed depending on your printer's bridging capabilities.

Assembly Notes

1. Insert the M2 heat-set inserts into the printed adapter using a soldering iron (keep it straight!).

2. Place the O4 Lite PCB between the two printed frames using the provided rubber dampers.

3. You may need to slightly widen the holes in the Master 3X metal side plates for a perfect fit.

4. Connect the voltage converter and tuck it into the integrated side compartment before final assembly.