[size=4] I made a small device that uses 51 to control two 12V/0.12A fans through PWM. When debugging, I found that at certain frequencies, the motor would make a "squeaking" sound (definitely not cau...
I bought an mv3 during a promotion some time ago, and I've been playing with it for a while. While playing with the mv3, I accidentally clicked the upgradebutton, and the firmware crashed, and the mv3...
[size=4][b]Event details: [/b][url=https://www.eeworld.com.cn/huodong/TISmartLock_20171226/][color=#0000ff]Click here to enter [/color][/url] [b]Registration period: [/b]From now on to January 15 [b]L...
Modern living patterns make the safety of family life particularly important. At present, security prevention and alarm systems are important guarantees for ensuring the safety of residences and resid...