Pixhawk 4 Mini QAV250 Kit Quick Start Guide

This guide provides essential steps for assembling the Holybro Pixhawk 4 Mini QAV250 Kit.

Tools Needed

• 2.0mm Hex ?
• #0 Phillips ?
• Wire cutters ✂️
• Precision tweezers ?

Required Components

• QAV250 Basic or Complete Kit
• RC receiver and compatible transmitter
• Battery - 4s 1300mAh

Kit Parts

Figure 1 displays all the parts included in the QAV250 Kit. Each part is numbered for easy identification.

• 1. Mid Plate
• 2. Top Plate
• 3. Bottom Plate
• 4. Flight Controller Plate
• 5. Landing Leg x 4
• 6. Arm x 4
• 7. Frame Hardware
• 8. Propellers
• 9. Motor x 4
• 10. GPS
• 11. Pixhawk 4 Mini
• 12. Battery Straps
• 13. Atlatl HV FPV Transmitter*
• 14. Telemetry Radio
• 15. Micro Telemetry Radio
• 16. Foxeer FPV Camera*
• 17. Cables
• 18. Foam Pads
• 19. Power Distribution Board - fully assembled with ESCs

FPV Components

This illustration shows the FPV (First Person View) components: the FPV Camera, FPV Transmitter, and FPV Power Board.

Assembly Instructions

Step 1: Frame Base and Power Distribution Board

Attach the Arms (6) to the Bottom Plate (3) using Steel M3 12mm ? (x16) and Steel M3 Locknut ? (x16). Secure the Mid Plate (1) and Top Plate (2) similarly. Attach the Landing Legs (5) by sliding them up the arms until secure. Fasten the Power Distribution Board (PDB) (19) to the frame using Plastic Standoffs (x4), orienting it as shown in the diagram.

Diagram Description: Diagram illustrating the assembly of the drone's frame base, including the bottom plate, arms, mid plate, top plate, and landing legs. The Power Distribution Board (PDB) is shown being attached with standoffs.

Step 2: Motors and ESCs

Attach the Motors (9) to the arms as shown in Figure 3. Note the color of the propeller nuts and tighten screws firmly. Connect the ESCs (integrated into PDB 19) to the motor wires. Fasten ESCs and motor wires to the arms with zip ties. To ensure correct motor direction, test them before flight. If a motor spins the wrong way, swap any two of its three wires.

Diagram Description: Diagram showing motors being attached to the arms and ESCs being connected to motor wires. Zip ties are used for securing. Figure 3 details the correct placement of motors and propellers on the drone arms. It also indicates the required direction of propeller spin for forward flight.

Step 3: ESC Signal Lines

Connect the ESC signal lines to the MAIN OUT ports of the Pixhawk 4 Mini (11) in the correct order indicated in Figure 3. Orient the connectors as shown.

Diagram Description: Diagram of the Pixhawk 4 Mini flight controller, highlighting the 'MAIN OUT' ports for ESC signal connections.

Step 4: Flight Controller Plate

Fasten the Flight Controller Plate (4) to the plastic standoffs using Plastic Flat Head ? (x4).

Diagram Description: Illustration of the flight controller plate being fastened to plastic standoffs.

Step 5: Pixhawk 4 Mini Installation

Stick Foam Pads (18) onto the Flight Controller Plate (4). Place the Pixhawk 4 Mini (11) onto the foam pads, pressing down firmly. Ensure the Arrow ➡️ on the Pixhawk 4 Mini points toward the front of the frame.

Diagram Description: Diagram showing foam pads being placed on the flight controller plate, followed by the mounting of the Pixhawk 4 Mini flight controller.

Step 6: Wire Management

Secure loose wires to the frame using zip ties.

Diagram Description: Illustration demonstrating how to secure loose wires to the drone frame using zip ties.

Step 7: Power Management Board Connection

Connect the Power Management Board to the POWER port of the Pixhawk 4 Mini (11) using a 6-wire cable.

Diagram Description: Diagram showing the connection of the Power Management Board to the Pixhawk 4 Mini's POWER port via a 6-wire cable.

Step 8: RC Receiver and FPV Transmitter

Connect the RC Receiver to the Pixhawk 4 Mini (11). Use the PPM port for PPM receivers or the RCIN port for SBUS receivers. Connect the FPV Transmitter (13) to the FPV Power Board as shown in Figure 2. Attach the RC Receiver and FPV Transmitter [Complete Kit] to the rear of the frame using a zip tie.

Diagram Description: Illustrations detailing RC receiver connections to the Pixhawk 4 Mini and the FPV transmitter connection to the FPV Power Board. The placement of these components on the rear of the frame is also shown.

Step 9: FPV Camera

[Complete Kit] Attach the FPV Camera (16) to the Top Plate (2).

Diagram Description: Diagram showing the FPV camera being mounted onto the top plate of the drone.

Step 10: Standoffs and GPS

Attach 37mm Standoffs (x6) to the Mid Plate (1) using Steel M3 6mm ? (x6). [Complete Kit] Connect the FPV Camera (16) to the FPV Power Board as shown in Figure 2. Fasten down any loose wires to the frame with zip ties; the standoffs provide a good fastening point. Attach the Battery Straps (12) to the Top Plate (2). Loop the GPS (10) cable through the Top Plate and connect the GPS to the Pixhawk 4 Mini GPS MODULE port. Fasten the Top Plate (2) to the Standoffs with Steel M3 6mm ? (x6). Attach the GPS (10) to the Top Plate using the round foam pad and secure its cable to the frame with zip ties.

Diagram Description: Illustrations showing standoffs being attached to the mid plate, FPV camera connection to the FPV power board, GPS cable routing through the top plate, and the top plate being secured with screws. The GPS unit is shown mounted on the top plate.

Step 11: Telemetry Radios

Connect the Mini Telemetry Radio (15) to the Pixhawk 4 Mini (11) TELEM port. [Complete Kit] Connect the FPV Power Board to the Pixhawk 4 Mini as shown in Figure 2. Attach the Mini Telemetry Radio and FPV Power Board [Complete Kit] to the front of the frame using double-sided tape.

Diagram Description: Diagrams showing the mini telemetry radio connected to the Pixhawk 4 Mini's TELEM port, and the FPV Power Board connection. The placement of these components on the front of the frame using double-sided tape is also depicted.

Step 12: Further Setup

For continued setup and PX4 configuration, please visit:

https://docs.px4.io/en/frames_multicopter/holybro_qav250_pixhawk4_mini.html