Fiber to the Home (FTTH) fiber optic cables are generally divided into four sections from the central office to the user: trunk section, distribution section, introduction section, and access section, as shown in Figure 1. Figure 1: End-to-End Structure of FTTH Fiber Optic Cables Generally speaking, the fewer sections a fiber optic link passes through, … Read more
Developers of smart home devices are closely monitoring the foundational technologies of the new generation Zigbee 3.0 wireless standard, from gateways to hardware development. The perfect application of this technology in smart lighting, door locks, thermostats, and other home automation devices has sparked lively discussions. This article compiles ten common questions and answers regarding the … Read more
Original text: https://zhuanlan.zhihu.com/ p/138597214 Author: Liu Shikun Recently, there have been numerous breakthroughs in the research progress of Multi-task Learning (MTL) and many interesting new directions have been explored. This has greatly inspired me to write a new article, attempting to summarize and encapsulate the recent research advancements in MTL and explore the possibilities for … Read more
In modern industrial production equipment, there are numerous digital and analog control devices, such as motor start/stop, electromagnetic valve opening/closing, product counting, and the setting and control of temperature, pressure, and flow. For these automatic control issues in industrial sites, Programmable Logic Controllers (PLCs) have become one of the most effective tools for resolution. So, … Read more
Abstract This article introduces the correct connection methods for RS-485 networks, including twisted pair wiring and recommendations for proper installation of termination resistors. It lists the receiver waveforms under correct and incorrect termination. This application note provides a basic guide for connecting RS-485 networks. The RS-485 specification (officially known as TIA/EIA-485-A) does not specifically dictate … Read more
The RS-485 interface forms a half-duplex network, typically using a two-wire system with shielded twisted pair transmission. This wiring method allows for a bus topology structure, enabling up to 32 nodes to be connected on the same bus. Initially, data was output as analog signals for simple process quantities, and later, the RS-232 interface was … Read more
Abstract: This paper analyzes the characteristics of ZigBee wireless communication technology and home networks, introducing a smart home system that utilizes ZigBee technology for wireless networking. It focuses on the networking methods of ZigBee, the implementation of automatic control between nodes, and data collection and transmission. 1 Overview and Characteristics of ZigBee Technology 1.1 Overview … Read more
Wireless Local Area Network (WLAN) is a product of the combination of computer networks and wireless communication technologies. Specifically, it means that when setting up a local area network, traditional cabling is no longer used; instead, wireless methods such as infrared and radio waves are used as transmission media to connect, providing all the functions … Read more
This article introduces the correct connection method for RS-485 networks, including suggestions for twisted pair wiring and proper installation of termination resistors. It lists the receiver waveforms under correct and incorrect termination. Configurations from simple single transmitter/multiple receiver networks to multiple transceivers and multiple branch circuits are provided. This article can serve as a basic … Read more