[Spark Project] H743 Flight Controller (100 Yuan)

Project Notes:
7.13 Fixed the incorrect silkscreen direction of the 5V DC-DC diode;
6.20 Optimized power supply routing and adjusted the pin order of the GPS terminals. Previously, TX and RX were reversed. The BF firmware was recompiled, and the previous GPS compass was no longer recognized.
This flight controller is built using an STM32H743VIT6. The minimum resistor and capacitor size is 0.402 for easy soldering. H743 flight controllers on Taobao start at 199 RMB; this flight controller's production cost is under 100 RMB. Supports BF, INAV, and APM firmware (latest firmware available in QQ group: 154782128).
First-time use of the high-performance BMP390 barometer

. Average operating current: 3.2μA (1Hz). Barometric
pressure detection range: 300~1250hPa
. Absolute pressure accuracy: ±0.50hPa (P=300...1100 hPa T=0...65 °C).
Relative pressure accuracy: ±0.03hPa (P=700…1100 hPa T=25…40°C).
Temperature drift coefficient: ±0.6Pa/K (25°…40°C at 900 hPa).
Absolute temperature accuracy: ±1.5℃ (0…65℃).
Supported resolution: 0.016Pa (high-precision mode).
Supported sampling rate: 200Hz.
Operating temperature: -40~85℃.

Open source license.
 
This hardware design is based on CC-BY-NC-SA. Released under the 4.0 license, this work is for DIY learning and exchange among enthusiasts only, and any form of commercial use is strictly prohibited. This design is provided "as is," without any guarantee of quality or warranty. We are not responsible for any consequences or liabilities arising from product design, improper operation, or violation of local laws and regulations that result in damage to the creator's or any third party's personal safety, property, or resources.
CC-BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike License.
CC: Creative Commons license.
BY: Attribution; you must give appropriate credit, provide a link to this license, and indicate whether modifications were made (to the original work).
SA: ShareAlike; if you remix, transform, or build upon this work, you must share and release your contributions under the same license as the original.
NC: NonCommercial; you may not use this work for commercial purposes.
 
Flight controller configuration is as follows:
Hole spacing: 20/30.5mm
; Tuning parameters: Type-C;
Main MCU: STM32H743;
Gyroscope IMU: ICM42688 * 2
; Character overlay OSD: AT7456E
; Barometer: BMP388/BMP390
; Blackbox: 128MB
; Input voltage: 3S-8S
; DC-DC1: 5V/3A;
DC-DC2: 9V/2A;
LDO: 3.3V/500mA; 2-channel
flight controller firmware: BF, INAV, APM;
Wiring instructions.