try to design my personal keyboard
As mt first keyboard, i try to design a small keyborad for number zone. Not as same as regular keyboard, i tend to use stm32 instead of atmage.
Finish my PCB and successfully weld that. But what is so stupid is that i welded my shaft seat upside down, which led to i cannot put my shaft to my PCB. So i have to correct this problem.
i found a promblem that when you try to connnet stm32f103 to your computer by type-c, you should use two 5.1kR resistances in CC pin, which help computer to recognize the chip. For this version i did not use these resistance. Besides, you should use a 1.5k, which connects between D+ and 3.3V
