I used to use a wired network to implement two-way communication between this terminal device and the PC server through socket programming, but my boss said that it is best for mobile devices to commu...
[color=#4f4f4f][font="]Principles for selecting filter capacitors[/font][/color] [color=#4f4f4f][font="]In power supply design, the principle for selecting filter capacitors is: C≥2.5T/R[/font][/color...
For example, the commonly used 7805 often has capacitors added to the input and output ends. Some are of different sizes, some have polarity, and some have no polarity. What is the function of these c...
Embedded system development is divided into hardware and software: "Hardware: 1. ARM Introduction Embedded product hardware is mainly a development board with (ARM, DSP, FPGA) as the core. According t...
[i=s]This post was last edited by ohahaha on 2018-4-20 13:50[/i] [align=left][size=4]PCB Layout Design Specifications - Circuit Design (2)[/size][/align][align=left][size=4] [/size][/align][align=left...
Hi everyone: I have built an AD8302 amplitude and phase detection circuit as shown above. There is a 200uA/100KHZ constant current source as the excitation signal. The voltage on Rs and Rx is amplifie...
1. Introduction
RFID (radio frequency identification) is a non-contact automatic identification technology that emerged in the 1990s. It uses the characteristics of radio frequency signal prop...[Details]
China's new energy vehicles are in a transition period from research and development to real industrial development. In 2012, with the intensive launch of new energy vehicle policy planning, the de...[Details]
In this article, the high-performance DSP developed by TI can be used as an effective confidentiality method if it is applied to PC encryption cards.
As an effective network security solution,...[Details]
In recent years, lighting has become an important area that countries around the world are targeting to promote energy conservation and environmental protection. According to statistics, about 20% ...[Details]
Electronic systems are located at different points on the automotive power bus and therefore often need to operate under very stringent power requirements. These include load dump, cold crank, very lo...[Details]
1. Principle of displacement angle sensor
The angle sensor is used to detect angles. It has a hole in its body that fits the LEGO axle. When connected to the RCX, the angle sensor counts once ...[Details]
0 Introduction
With the development of society, people pay more and more attention to security work. Monitoring products have been used in various fields instead of being used only in importan...[Details]
In the previous series, we have listed some basic knowledge of C language in Tables 1 to 3. We hope that beginners can strengthen their memory of the above tables and gradually learn to use them wh...[Details]
Contact resistance
is the resistance to current flow through a closed pair of contacts. This type of measurement is performed on devices such as connectors,
relays
, and switches. The...[Details]
1 Introduction to HART Protocol
HART (Highway Addressable Remote Transducer), an open communication protocol for addressable remote sensor high-speed channels, was launched by Rosemen in the U...[Details]
1. Introduction
Testing the temperature of steel billets before rolling is an important measure to ensure the quality of steel. Traditional manual testing is difficult to ensure product qu...[Details]
LED lamps and bulbs are now rapidly replacing incandescent, halogen and CFL (compact fluorescent lamp) light sources in many general lighting applications. Flyback DC/DC converters are the power su...[Details]
Experimental tasks
A DS18B20 is used to form a temperature measurement system. The temperature measurement accuracy reaches 0.1 degrees. The temperature range is between -20 degrees and +50 de...[Details]
In 2012, more than half of the cars in the European, Japanese and American car markets will be equipped with color displays, navigation systems, satellite communications and other in-vehicle infota...[Details]
At present, the traffic congestion in cities is quite serious. According to relevant news reports: In China, the traffic congestion has expanded from megacities such as Beijing, Shanghai, and Guangzho...[Details]