With the development of smart cities around the world, surveillance systems can effectively improve the quality of life and ensure social security. In order to ensure public safety, technologies such
The BLDC I am using now is a tachometer motor + Hall. I collect the voltage of the tachometer motor signal as the speed information after passing it through a rectifier bridge. However, when the speed
[i=s]This post was last edited by sylar^z on 2020-3-30 09:24[/i]The reason for making this was that a starry sky lamp toy I had was broken, so I planned to buy some lamp beads to repair it. When I fou
Recently, Tencent announced an important research progress - through AI technology, it drew for the first time the protein structure of the culprit of baldness "type II 5a reductase (SRD5A2)" - it can