//The first line displays 'a' and the second line displays "welcome" #include
void initial_lcd(void);//初始化
void write_code(unsigned char m);//写代码
void write_char(unsigned char m); //写字节
void write_str...
How to calculate a sine wave? Put the sampling coordinates of the sine wave into an array, and then how to output the sine wave? Here is a formula. I hope you can give me some guidance. Thank you! y=s...
The output of MPXV2202DP connected to IN132 is abnormal. The differential output of MPXV2202DP is 0-16.3mV when unloaded. After connecting to IN132, it is fixed to 60mV. I think it is an impedance mat...
[font=宋体][font=新宋体]Dear seniors: Can you tell me what files should be given to the manufacturers for PCB board making and patching? Just give them what they need, not more. Thanks for your guidance! [...
I am currently working on a PDA driver, using the WinCE operating system, and need to determine the remaining battery power. The battery is 3600 mAh, and a full charge is 4.2V. The PDA will not work p...
I transplanted the uC/OS-III system a few days ago, and everything can be compiled. However, a problem occurred when I wrote a multi-task program test. If there are three tasks executed concurrently, ...
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]
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. With the development of modern industry and the continuous improvement of automation, some medium and large control systems have been greatly facilitated, which not only makes control easier, bu...[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]
The potentiometer is an adjustable electronic component. The main functions of the potentiometer in the circuit are as follows:
1. Used as a voltage divider
A potentiometer is a continuou...[Details]
With the advocacy and implementation of the government's Safe City Plan, the security market has increasingly higher requirements for the clarity of surveillance images. Imagine that after a case o...[Details]
At very low temperatures, certain metals and alloys lose their resistance to electric
current
and become
superconductors
. Two parameters that are often measured are the transition ...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
Since AC mains power may experience power outages, voltage sags and surges, continuous undervoltage and overvoltage, and frequency fluctuations during supply, these factors will affect the continuous ...[Details]
LED is the abbreviation of the English word. Its main meanings are: LED = Light Emitting Diode, a solid-state semiconductor device that can convert electrical energy into visible light. It can dire...[Details]
Multimedia processors are often the most power-hungry devices in portable electronic devices. Common ways to reduce CPU power requirements are to reduce clock frequency or operating voltage, but th...[Details]
The overall operating performance of an electric car depends first on its battery system and motor drive system. The drive system of an electric car is generally composed of three main parts: a con...[Details]
There are many types and styles of digital voltmeters in design and development. Traditional digital voltmeters have their own characteristics. They are suitable for manual measurement on site. Tra...[Details]
0 Introduction
In the design and construction of communication systems,
communication power supply
is called the heart of the communication system. The power supply system will dire...[Details]