DAKEFPV H743 Flight Controller & 4-in-1 ESC Stack Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, setup, and operation of the DAKEFPV H743 Flight Controller (FC) and 4-in-1 Electronic Speed Controller (ESC) Stack. Designed for high-performance FPV drones, this stack offers advanced features and robust power delivery. Please read this manual thoroughly before attempting installation or operation to ensure proper functionality and prevent damage.

Video: Overview of the DAKEFPV H743 FC and 4-in-1 ESC Stack components.

2. Specifications

2.1. DAKE H743 30x30 Flight Controller

2.2. DAKE 12S 70A 4-in-1 ESC

2.3. General Product Properties

• Material: Composite Material
• Recommend Age: 14+y, 3-6Y, 6-12Y
• Use: Vehicles & Remote Control Toys
• Is Electric: No Battery
• Is Batteries Included: No

3. Package Contents

The DAKEFPC H743 stack is available in several configurations. Please verify your package against the list below.

3.1. Option 1 - DAKEFPV H743 70A 30x30 STACK

Image: Contents of the DAKEFPV H743 70A 30x30 STACK package.

1. DAKEFPV H743 Flight Controller x 1
2. DAKEFPV BLS 70A 4 in 1 ESC x 1
3. 35V 1000uF Low ESR Capacitor x 1
4. M3 Nylon Nut x 5
5. M3 silicone O Ring x 5
6. M3*8mm Silicone Grommets (for FC) x 1
7. M3*8.1mm Silicone Grommets (for ESC) x 1
8. SH 1.0mm 25mm-length 8pin Cable (for FC-ESC connection) x 1
9. SH 1.0mm 75mm-length 8pin Cable x 1
10. M3*30mm Inner-hexagon Screws x 5
11. GPS 6pin cable, Analog VTX 6pin cable, dual-camera 6pin cable x 1
12. XT60 Power Cable (70mm) x 1

Note: When the ESC tail faces the drone's front, use the SH 1.0mm 25mm-length 8pin cable for the flight controller and ESC; both ends plug interchangeably.

3.2. Option 2 - DAKEFPV H743 70A 30x30 FC (Flight Controller Only)

Image: Contents of the DAKEFPV H743 70A 30x30 FC package.

1. DAKEFPV H743 Flight Controller x 1
2. Silicone Grommets (random colors) x 8, hexagon screws x 5, hexagon nuts x 5, silicone O rings x 5
3. FC12-pin to ESC 8-pin cable, LED/buzzer 4-pin cable x 1
4. GPS 6-pin cable, analog VTX 6-pin cable, dual-camera 6-pin cable x 1, receiver 4-pin cable

3.3. Option 3 - DAKEFPV 8S 70A 4 in 1 ESC (ESC Only)

Image: Contents of the DAKEFPV 8S 70A 4 in 1 ESC package.

1. DAKEFPV 8S 70A 4 in 1 ESC x 1
2. 35V 1000uF Low ESR Capacitor (For 12S ESC, a 63V 1000uF Capacitor is sent)
3. FC 12-pin to ESC 8-pin cable (for connecting FC to ESC)
4. XT60 x 1

4. Setup & Installation

4.1. Important Stack Installation Note

Image: Diagram illustrating the importance of spacing during stack installation.

When installing your stack, adhere to the standard mounting method. The orientation of the gyro and motor sequence can be adjusted through settings. If you opt for an inverted manner, be extra careful about the space between the frame, the FC, and the ESC.

It's critical to swap the silicon pads when changing the positions of the FC and the ESC, as illustrated below. This step is vital to prevent any contact between the FC's USB interface and the ESC, which could lead to a short circuit. Please be aware that any damage resulting from improper installation of this nature is not covered under the Warranty.

4.2. Wiring Diagram

Image: Comprehensive wiring diagram showing connections for the FC, ESC, motors, receiver, VTX, GPS, and LED.

This diagram illustrates the typical connections for the flight controller and ESC, along with common peripherals. Ensure all connections are made securely and correctly before powering on the device.

4.3. Layouts

4.3.1. H743 Flight Controller Layout

Image: Detailed layout of the H743 Flight Controller, highlighting key components and connection points.

4.3.2. BLS 70A 4-in-1 ESC Layout

Image: Detailed layout of the BLS 70A 4-in-1 ESC, showing motor pads and power connections.

4.4. Receiver Connection Notes

4.4.1. SBUS Receiver Importance Notice

Image: Diagram showing the SBUS signal wire disconnection requirement when using DJI Air Unit.

When using an SBUS receiver, the SBUS signal wire of the receiver must be connected to the SBUS pad on the front side of the flight controller (this pad internally uses UART2). If you are also using the DJI Air Unit (O3/Link/Vista/Air Unit V1), you will need to disconnect the SBUS signal wire from the Air Unit harness. Failure to do so will prevent the SBUS receiver from being properly recognized by the flight controller. You can use tweezers to pick out the SBUS wire from the 6-pin harness connector (or directly cut this wire) and insulate the exposed part of the wire carefully.

4.4.2. ELRS Receiver Importance Notice

Image: Diagram illustrating the ELRS receiver connection and the need to disconnect a specific wire for proper function with DJI Air Unit.

We recommend connecting the ELRS receiver's TX and RX to the T2 and R2 pads on the flight controller. However, when using the DJI Air Unit simultaneously, some ELRS receivers may not be recognized properly by the flight controller. If you encounter this issue, you need to disconnect the SBUS signal wire from the Air Unit harness. You can use tweezers to pick out the SBUS wire from the 6-pin harness connector (or directly cut this wire) and insulate the exposed part of the wire carefully.

4.5. Air Unit Cable Connections

4.5.1. Cable Connection vs RunCam Link/Caddx Vista Air Unit

Image: Connection diagram for RunCam Link/Caddx Vista Air Unit using the 6-pin cable.

Use the 6-pin cable that comes with the H743 stack (accessory No.11 in the package section).

4.5.2. Cable Connection vs DJI Air Unit V1

Image: Connection diagram for DJI Air Unit V1 using the 6-pin cable.

Use the 6-pin cable that comes with the H743 stack (accessory No.11 in the package section).

4.5.3. Cable Connection vs DJI O3 Air Unit

Image: Connection diagram for DJI O3 Air Unit using the 6-pin cable.

Use the 6-pin cable that comes with the O3 Air Unit.

4.6. LED Light Bar Pads

Image: Diagram showing the LED pads on the flight controller and their functionality.

The LED pads at the corners of the flight controller allow you to decorate your aircraft with your favorite LED light strips. A single press of the BOOT button lets you switch between different lighting modes. A long press of the BOOT button switches to this mode, and short presses of the BOOT button let you toggle between various preset light effects.

4.7. Low ESR Capacitor & Direct Soldering

Image: Diagram showing direct soldering points for FC and ESC, and the recommended Low ESR capacitor.

Note 1: In order to prevent the stack from being burnt out by voltage spikes on powering up, it is strongly recommended to use the Low ESR capacitor included in the package.

Note 2: The FC and ESC can also be connected via direct soldering. Soldering pads definition is as follows:

• FC: GND, 5V, 12V, VTX, CAM, OSD, BAT, M1-M8, R1-R8, T1-T8, SDA, SCL, ELRS, GPS, USB, LED, Buzzer.
• ESC: BAT+, BAT-, M1-M4, GND, Current Sensor.

4.8. TVS Diode and Filter Capacitors

Image: Diagram illustrating the TVS protection diode and filter capacitors on the ESC.

The ESC includes a TVS protection diode, which effectively absorbs voltage spikes caused by the moment of power-on and crashes. The onboard 21 high-quality imported Japanese TDK 35V 22uF SMD filter energy storage capacitors, plus the standard 1000uF true high-frequency low-resistance electrolytic capacitor, effectively filter out signal interference from the power supply to the flight controller's gyroscope, making the flight smoother.

5. Operating Instructions

5.1. Flight Controller Features

Image: Overview of additional features including barometer, black box, DJI Air Unit direct plug-in, BECs, URATs, and GPS module power.

• Barometer: The onboard barometer can sense the aircraft's altitude in real-time.
• Black Box Flash: Built-in 16MB high-speed FLASH continuously records flight status (sensor data, control commands, fault codes). Data can be retrieved for accident analysis even after a crash or power outage.
• DJI Air Unit Direct Plug Interface: Compatible with DJI O3/Vista/AirUnit V1.
• Dual Independent BECs: 12V 3A + 5V 3A dual independent BECs provide ample power for peripherals.
• Serial Ports (UARTs): Ample 8 groups of idle serial ports, supporting receiver + Image transmission + camera + GPS.
• USB Power: When powered via USB, it can supply power to the receiver for easy debugging.
• Reserved Pads: A large number of pads are reserved for all enthusiasts, providing sufficient soldering space.

5.2. Motor Support

Image: Diagram showing motor outputs M1-M8 on the flight controller.

The flight controller supports 8 motors, so it can be used on your X8, Y6, fixed-wing, and other aircraft models that require more than 4 motors. It also supports 4 servos.

5.3. Battery Capacity Indicator

Image: Diagram showing the 4-level battery capacity indicator on the FC.

On the side of the flight controller, you will find a 4-level battery capacity indicator. As soon as you connect the battery, you can instantly see the battery level, saving you the hassle of needing to put on goggles to check the battery status.

6. Maintenance

• Regular Inspection: Periodically check all solder joints and connections for any signs of corrosion, damage, or loose wires.
• Cleaning: Keep the FC and ESC clean from dust, dirt, and debris. Use compressed air or a soft brush to gently clean the components. Avoid using liquids directly on the electronics.
• Firmware Updates: Regularly check for new firmware releases for Betaflight/Ardupilot and BLHeli_S/BlueJay. Updating firmware can provide performance improvements, bug fixes, and new features.
• Storage: When not in use for extended periods, store the stack in a dry, cool environment, away from direct sunlight and extreme temperatures.

7. Troubleshooting

• No Power: Check battery connection, XT60 connector, and ensure the Low ESR capacitor is correctly installed. Verify power leads are not shorted.
• FC Not Responding: Ensure USB cable is properly connected. Try forcing DFU mode by holding the BOOT button while plugging in USB and re-flashing firmware.
• Motors Not Spinning: Check ESC connections to FC and motors. Verify motor direction and ESC protocol in Betaflight/Ardupilot. Ensure ESC firmware is compatible and up-to-date.
• Receiver Issues: Double-check SBUS/ELRS wiring. If using DJI Air Unit, ensure the SBUS signal wire is disconnected from the Air Unit harness as per instructions.
• Unstable Flight: Review PID settings in Betaflight/Ardupilot. Check for loose components or vibrations affecting the gyroscope. Ensure proper stack installation with adequate spacing.
• OSD Not Displaying: Verify OSD settings in Betaflight. Check for proper video signal input/output connections.

8. User Tips

• Always use the provided Low ESR capacitor to protect against voltage spikes, especially with higher cell count batteries.
• When assembling the stack, pay close attention to the orientation of the FC and ESC to avoid short circuits, particularly around the USB port.
• Utilize the 16MB black box flash for flight logging. This data is invaluable for diagnosing flight issues and optimizing performance.
• Take advantage of the multiple UARTs for connecting various peripherals like GPS, external receivers, and digital video systems.
• For advanced users, consider experimenting with different ESC firmware (e.g., BlueJay) to fine-tune motor performance, ensuring compatibility with your motors.

9. Warranty & Support

DAKEFPV products are designed for enthusiasts and require careful installation and handling. Damage resulting from improper installation, misuse, or unauthorized modifications is not covered under warranty. For technical support, firmware updates, or further assistance, please refer to the official DAKEFPV website or contact your retailer.