Qinheng CH549L is an 8051 chip, which is not so conspicuous in the blue ocean of ARM. I tested this chip through the eeworld event and it still made a lot of money.
1. First of all, 8051 is not outdat
Double 11 is here again~~ Today is the day, did you guys buy anything? ? ? Guan Zai said that I really held back this year, and it was the Double 11 that I spent the least in all these years, but I st
[align=left]The complete PCB we envision is usually a regular rectangular shape. Although most designs are indeed rectangular, many designs require irregular-shaped circuit boards, which are often not
1. Does anyone have any documents you want?I'll see if I have them, or try to find them and upload them.I'm really poor and want to earn some points.2. [Key question] If someone else has uploaded it,