1. MFRC522 is a highly integrated contactless (13.56MHz) card reader/writer chip. This transmitter module uses the principles of modulation and demodulation and fully integrates them into various cont
Functional Description This project includes two buttons and a 4-digit digital tube display, which together realize a 24-second countdown of , and have the functions of pausing and re-counting. The sp
[align=center][/align] I often see UP hosts recommending "White Snake" on Bilibili. I watched it today and thought it was really good. I rarely recommend movies to others, but today I recommend it. I
It is required to be able to output 1-5Hz square wave, triangle wave and sine wave signals. The frequency of the output signal can be adjusted from 1-5Hz, and the frequency of the current signal is di
Writing C programs in a certain style can help the C compiler generate faster ARM code. Here are some key points related to performance: 640?wx_fmt=png&wxfrom=5&wx_lazy=1 1. Use signed and unsigned in