Author: Jin Yuan Whether you are a hardware DIY enthusiast or a maintenance technician, can you tell what the small components on the motherboard, sound card and other accessories are called and what
I want to learn high-speed PCB wiring. The first problem I encountered is how to place vias. For example, how big should the vias be for 8mil and 6mil lines? What should I pay attention to when crossi
Function full name: 50us delay Notes: Based on 1MIPS, AT89 series corresponds to 12M crystal oscillator, W77, W78 series correspond to 3M crystal oscillator Example Tips: Call delay_50us(20) to get 1m