I recently worked on a mobile phone project, and the charger chip used was SMB Qualcomm. When the battery was fully charged, the charger was plugged in, and the test would suddenly fail all night! I h...
The installed OS is WINCE6.0+SP2, and the updated package is installed. When compiling OS with built-in BSP under WINCE6.0, there is always a compilation error, and the build.log file outputs: EDITBIN...
Repair diagram reading refers to the analysis of circuit diagrams during the repair process. This reading is very different from the reading of diagrams when learning the working principle of circuits...
1. How to determine whether the keypad light is on or off? 2. How to get the sound output device? For question 1, I found a piece of code: CEDEVICE_POWER_STATE powerState; GetDevicePower("BKL1:",POWER...
/*------------------------------------------- Project name: Household appliance central control system project Program name: Display MCU overall program Writer: Du Yang Initial writing time: 20:00 on ...
The schematic diagram of the circuit is shown below.Simplified circuit of switch circuit
Before the circuit is powered on, the switch "TEST" is turned off and the microcontroller is not powered by VCC...
Due to the significant increase in electronic devices in automotive and industrial applications, the automotive and industrial markets continue to play an important role in China's electronics in...[Details]
1. What is temperature?
Heat is a type of molecular motion. The hotter an object is, the faster its molecules move. Absolute zero is defined as the temperature at which all molecular motion ...[Details]
In recent years, with the rapid development of the information industry, dot matrix LED display screens have been widely used in various advertising and information display systems such as the fina...[Details]
As a simple and practical input device, buttons have been used in various microcontroller application systems and are ubiquitous. However, the buttons used in different practical occasions are also...[Details]
Today, the value of electronic components in cars accounts for 15-20% of the total vehicle. In the future, this proportion may be as high as 30-40% as more safety electronics, fuel consumption and ...[Details]
At present, a large number of cooling tower fans, speed fans and special fans are in use in petroleum, chemical, pharmaceutical, metallurgical and other enterprises. Some fans have no monitoring in...[Details]
With the continuous advancement of various technologies in the field of measurement and control, the baseband subsystem of general measurement and control equipment has entered the fourth generation o...[Details]
Abstract: Based on the ZigBee parking lot SMS car search system, the location of the vehicle in the parking lot is sent to the owner through SMS, which is convenient for the owner to quickly find ...[Details]
The most important components of new energy electric vehicles are power batteries, electric motors and energy conversion control systems. The power battery must achieve high performance such as fas...[Details]
Currently, high-frequency and high-efficiency DCDC converters are increasingly used in automotive electronic systems.
High switching frequency can use smaller power inductors and output filter...[Details]
1 Introduction
With the development of computer technology and information technology in the world, the global information age has arrived. All countries are formulating their own development p...[Details]
1 Introduction
Lijia'an Yellow River Diversion Culvert is a large gravity diversion gate in the lower reaches of the Yellow River. The Yellow River Diversion Culvert is located in Lijia'an Vi...[Details]
In the past 20 years, although the inverters that use power transistors (GTR) as inverter power devices, 8-bit microprocessors as control cores, and realize asynchronous motor speed regulation acco...[Details]
1 Introduction
Intelligent cars are the embodiment of the cross-integration of multiple disciplines such as automotive electronics, artificial intelligence, pattern recognition, automatic con...[Details]
The circuit has overcharge protection, over-discharge protection, over-current protection and short-circuit protection functions. Its working principle is analyzed as follows:
1 Normal state
...[Details]
Power technology
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