QMK customized keyboard 84-key USB HUB verification board

Feature overview:

[QMK customized keyboard]: 84 RGB configurations, 5-level PWM dimming breathing backlight, rotary encoder, supports via key changes, macros, key combinations, etc.
【USB2.0 HUB】: 1 to 3 USB2.0 hub. 

MCU: ATMEGA32U4, very convenient for programming and other operations, but the 32K flash is small and cannot hold too many lighting effects.

Supports rotating encoder to dynamically change keys, adjust volume, and turn pages. QMK's Auto Shift, macros, key combinations, and other functions can all be enabled and set as needed.

sequence:

As we all know, technology is mainly about shell replacement, and customized keyboards are mainly about tuning (manual dog head, escape)

In order to quickly understand (and get rid of) the customized keyboard, I made a verification board (without drawing the casing). After all, the finished wireless mechanical keyboard is not too expensive, so buying a three-mode model is enough!

It is enough for research and learning to make a development board for verification.

The verification version refers to the design of Laoxuan v1 and draws the mini verification version. Reference link: https://oshwhub.com/Neilzx/zhong-ji-tui-shao-jian-pan

Laoxuan v2 version, theoretically supports ARM's LFQ48 chip, has been completed and needs to be verified: https://oshwhub.com/0xcb/kb_n32

Zhihui Jun's Hanwen keyboard development board, pending design modification: https://oshwhub.com/0xcb/helloworld

Interested students can also study and learn customized dual-mode keyboards based on nRF.

designing process:

The circuit diagram and PCB of the first version were made on the standard version. You can imagine the pain points of a large number of button settings, lags and some bugs.