[size=9pt]Classification, structure and selection principle of time relayTime relay is an automatic control appliance that uses electromagnetic principle or mechanical action principle to realize cont
[i=s]This post was last edited by dontium on 2015-1-23 12:41[/i] The information says that this circuit needs to add a pull-down resistor to be reliable. I want to know why it is unreliable?
Jiangsu Linux Public Technology Service Center will hold another free embedded lecture on January 19th. Embedded enthusiasts are welcome to attend! Lecture time: 9:30 am, January 19th Lecturer: Embedd
The core value of NVR is video middleware. The video surveillance industry is rapidly entering the NVR era. Unlike the DVR era, the focus of competition will not only be the design and implementation