The "first bid in the country" for tax -control cash registers was issued recently in Guangdong Province, and five companies won the bid. On February 15, the Guangdong Provincial Government Procureme...
Development board: EasyArm1138 development board produced by ZLG (I bought it for 100 RMB before , but now I have time to learn ARM )
Development software: IAR Embedded Workbench 5.0 Kickstart
Learnin...
Recently, I used DS12887 to make a Nixie tube electronic clock (52+12887+74HC595), and used protues to simulate it. Now I can write data, and the small box next to 12887 can read the written data. The...
Using the STM USB firmware library to implement multi-endpoint HID transmission, Mouse or Keypad alone, there is no problem!The bus hangs when implementing a dual-interface device!!!!!/* USB Configura...
In recent years, the government has increasingly supported electric vehicles, and the number of electric vehicles has increased. Observant drivers will notice that there are many more green license...[Details]
Multi-touch mobile phone
Multi-touch is a system that can respond to multiple touches on the screen at the same time. Multi-touch phones are divided into capacitive and resistive types. Capaci...[Details]
The structure of an LCD TV primarily consists of the LCD display module, power module, driver module (primarily including the main driver board and tuner board), and keypad module. LCD display modu...[Details]
Smartphones have become essential digital devices, and the growing number of smartphone-centric applications is enriching people's lives. As users, they desire a better app experience and a wider r...[Details]
A human-machine interface (HMI) refers to the platform used by people to operate a PLC. This platform provides an interface between programs and humans, serving as a medium for information transmis...[Details]
The difference between a series inverter and a parallel inverter is that they use different oscillation circuits. A series inverter connects L, R, and C in series, while a parallel inverter connect...[Details]
There are more and more electric vehicles. Recently, I have heard some news about electric vehicles performing poorly in winter. I would like to briefly introduce whether heat pump technology is mo...[Details]
introduction
With the development of the information superhighway and the internet, broadcast television has become increasingly widespread worldwide. Television information has emerged in var...[Details]
EVTank predicts that all-solid-state batteries will achieve small-scale mass production in 2027 and large-scale shipments by 2030. Global solid-state battery shipments will reach 614.1GWh, of which...[Details]
While aberration theory is a vast subject, a basic understanding of some fundamental concepts can make it easier to understand: spherical aberration, astigmatism, field curvature, and chromatic abe...[Details]
From smartwatches to portable health and fitness trackers, wearable devices are increasingly transforming every aspect of our daily lives. The desktop computer revolution of the 1980s ushered in an...[Details]
introduction
As the concept of "low-carbon travel and green environmental protection" becomes more and more popular, bicycles have become a crucial means of transportation. Currently, urban pu...[Details]
The working principle of a frequency converter is to process input fixed-frequency AC power through circuits such as rectification, filtering, and inversion, and then output AC power with variable ...[Details]
Although everyone has their own unique approach to PLC programming, the ultimate model is the same. This article uses the simple ladder diagram programming method of Mitsubishi PLC as an example to...[Details]
Comparison instructions compare two numbers, IN1 and IN2, of the same data type. IN1 and IN2 are located above and below the contact, respectively, and their data types must be the same. Operands c...[Details]
Mobile and portable
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