Zhihuijun L-ink Card modified version link card

# Statement that
this project is only a personal modified version of Zhihui Jun's L-ink Card project. It is only for everyone's DIY entertainment. The author of the correction: Mysterious Treasure Room

is not familiar with LCEDA and uses SCH and PCB drawn by altium designer. In the project It is just a file that is directly converted to LCEDA, and it is not guaranteed to be usable directly. You can download the original ad image schdoc or gerber in the shared file to draw and proof it yourself.

Latest information Q group number: 537081371

# Function description

1. For the overall production and use process of the project, refer to the video tutorial:

https://www.bilibili.com/video/BV1oe411u7Q3

2. Overall modification instructions, the overall guarantee is that you can use the Mingming up version Basically, I made some modifications based on my personal ideas, retaining the lithium battery charging and discharging circuit that was obviously modified. Mainly, the modified project is a single panel, which reduces the difficulty of DIY. It can be soldered directly on the soldering station, which reduces the difficulty of soldering. It replaces some component packages, corrects some circuits, and adds a USB-TTL circuit, which can be used for burning codes, or directly using Mingming. Up's host computer updates the ink screen display

![image-20221105211443481.png]

![image-20221105213131328.png]
3. The shell has been redrawn to adapt to the new hardware and can be printed with a 3D printer

![image-20221105215746162.png]
! [image-20221105220330293.png]
4. Since the original screen of the Zhihui Jun linkcard project has been discontinued, and the screen of Weixue has been updated to the v2 version, I used my professional STM32 programming skills to boldly modify it to adapt to the v2 version screen display. The hex file of Mingming Up's host computer is available for everyone to use. You no longer have to worry about the problem of not being able to buy a screen.

Of course, if you use the original screen, you can also directly use Zhihui Jun's original firmware, or Mingming Up's firmware. The hardware is compatible with different screens. Just use different firmware versions

5. Provide purchase list BOM form, and component purchase link, see group shared online documents for real-time viewing, the sharing link below is automatically generated
! [image-20221105213528562.png] 6. Provide dynamic BOM, etc. The file is for welding use. The format of shared files is restricted. You can only download it to the group sharing
! [image-20221105213559555.png]