Review: Diatone Mamba MK4 H743 FC (H7 Flight Controller)

by Oscar
Published: Last Updated on
Diatone Mamba H7 Fc Flight Controller

Diatone is always pushing the edge of what’s possible in FPV and there’s no exception with this new H743 flight controller! As an added bonus, it also features 8 motor outputs for octo builds!

Where to Buy?

What’s included in the box:

  • Two sets of rubber grommets
  • Two FC to 4in1 ESC cables of different length
  • EMI shielding (to be inserted between FC and 4in1 ESC)

Note that in the longer ESC cable, the wires are not intentionally inserted in the plug. It allows you to re-arrange the wires in the correct order in case you are using a different brand ESC. It’s a nice touch by Diatone.

Diatone Mamba H7 Fc Flight Controller Unbox Accessories

Specs and Features

  • Input Voltage: 3S – 6S
  • MCU: STM32H743 (480MHz)
  • Gyro: BMI270 or MPU6000 (option on product page)
  • Barometer: Yes
  • OSD: Yes
  • Blacbox: 128M Flash Memory
  • Uarts: 8Set
  • ESC Signal: 8Set
  • Protocol: Dshot300/600/1200
  • ESC Telemetry: Yes
  • Power Led: Yes
  • LED Controller: BF LED/MB LED
  • I2C: Yes
  • F.Port: Yes
  • Buzz: Yes
  • TVS Protection: Yes
  • BEC: 3.3V 0.5A & 5V 3A (System Power)& 5V 3A(LED) & 9V 3A
  • Mounting Pattern: 30×30 M3

Here’s the manual and wiring diagram.

Diatone Mamba H7 Fc Flight Controller Manual Instructions Wiring

Closer Look at the Mamba MK4 H743 FC

The latest Mamba MK4 H743 FC from Diatone continues with similar design to the previous Mamba F722 MK2.

First of all, the pin layout of this board is pretty user friendly and clean.

They keep in mind what components you are going to connect and group these solder pads in different sides of the board. However none of the pads are labelled, so you would have to constantly refer to the manual when soldering, this is probably one of the major complaint I have.

Great to see they are using a USB-C connector here instead of the older and more fragile micro USB port.

It has an array of LED at the bottom left of the board, giving you an overview of the system status, what’s working and what isn’t, which is a handy feature for experienced pilots.

Diatone Mamba H7 Fc Flight Controller Top Close Up

It supports both analog FPV system and DJI FPV system. It has the AT7456E chip for overlaying Betaflight OSD on analogue video feed, as well as a powerful 9V BEC for DJI Air Unit/ Caddx Vista (DJI FPV system).

There are 8 UART’s available so realistically you won’t have to worry about running out of ports to connect to peripherals. It also has i2c port too for certain types of GPS and compass.

It has built-in TVS diode for reverse polarity protection.

There’s onboard 128MB Flash Memory for blackbox logging, more than enough for tuning.

They avoided any solder pads on the bottom of the board, which is a smart and considerate design decision to keep wiring clean and easy to do.

Diatone Mamba H7 Fc Flight Controller Bottom Close Up

The Mamba H743 FC offers flexible control of LED. You can either control LED through Betaflight, or the FC’s own LED control system.

This is made possible by bridging solder pads on the FC. By bypassing Betaflight and use the FC’s own LED control system, you can control LED’s color and pattern with just a push button (located under the boot button). This makes switching to different color super easy in the field. Overall a well designed board that is packed with features. I will be using this board on a feature build, stay tuned for more.

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10 comments

Michal 30th April 2022 - 7:53 pm

Is it possible to install and run Arducopter on this board? Or is too early to find some ready solutions and it need to do it from scratch.

Reply
Lac Vo 22nd March 2022 - 8:41 pm

I am using this FC with Betaflight 4.3 pre-release candidate 3 and experienced some weird behaviors 1, one or more motors spin up randomly when quad is connected to PC with USB – C cable and have battery plugged in 2, a known good beeper soldered to this FC make no sound at all and 3, GPS module connected to this FC takes a very long time to lock in to GPS satellites while the same GPS module connected to Mateksys FC (F722-SE) connected to the same number of satellites or much more in just a few minutes. Do you have any explanations for these issues?

Reply
Martin Thalmayr 20th March 2022 - 9:10 pm

Hello,
I am curious about the Flash size for the firmware on this board. I have asked Diatone on this and they said 1GBit, but i think they sent me the size of the one for the blackbox. When i google the chip it says up to 2Mbyte, so it sounds like it could be less. Could you please check what its size is? Thank you very much!

Best,
Martin

Reply
Oscar 22nd March 2022 - 3:48 pm

See SRAM of different processors in this post: https://oscarliang.com/f1-f3-f4-flight-controller/
For H743 the SRAM is 1MB

Reply
Thomas 19th February 2022 - 11:01 pm

Hey Oscar, I’m your review you’re talking about a dedicated plug for Vista/ Air Unit. Haven’t found this in my H743… which UART would be dedicated? I’m using RX3/TX3 now, since it has no “DJI” plug like my Holybro H7.

Reply
Stephen 7th February 2022 - 4:35 pm

Does this work with BetaFlight 4.3 and bidirectional dshot? Many H7 boards have bugs and cannot spin all motors once bidir shot is enabled – which means they cannot use RPM filter.

Reply
Ondrej 23rd March 2022 - 9:16 pm Reply
Dave 16th January 2022 - 9:46 am

Can you update some of your articles like the best esc, fc. Thanks

Reply
Kasper 19th January 2022 - 1:45 am

What’s the difference between the gyros

Reply
T 12th February 2022 - 8:05 pm

Der BMI 270(Bosch) ist sensitiver ;)

Reply