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PMDG737-MPU peripherals developed based on SimConnect

Overview

The power input directly provides 5V to the MAX7219 and 3.3V to the AT24C02, CH340, and STM32F103C6T6 via the 1117. Considering the potentially high power consumption of the digital tube, a power supply connection is reserved.

The main control

digital tube display uses a digital tube driver chip, which effectively reduces I/O usage.

Buttons are acquired using an ADC, achieving the effect of one I/O for multiple buttons. In practice, it can connect eight buttons and

three rotary encoders. However, most purchased rotary encoders already have buttons, which is an oversight and can be modified.

The AT24C02 is not very useful and can be left unsoldered. Its initial purpose was to store the digital tube brightness, but this is not yet implemented in the program.

The CH340 communicates with the PC, and

LEDs are used for indication. See the

program documentation: https://gitee.com/gu2188/PMDG737-MPU-PC_microcontroller_program
, https://gitee.com/gu2188/PDMG737-STM32_demonstration_video
, and https://www.bilibili.com/video/BV1JU411d7mi

Design Files

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Update:2026-03-26 13:37:30

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