[font=宋体]First, the history of RFID [/font][font=宋体]... [/color][color=windowtext]3[/color] [font=宋体]Second, the composition of the RFID[/font][font=宋体] system[/font][color=windowtext]... [/color][col...
I'm working on the virtual serial port of stm32 recently. I downloaded the program to the chip, but after running it, it prompts that the USB device cannot be recognized. I know this is because the dr...
A Sine Wave Inverter Based on Sliding Mode ControlAbstract: A new sine wave inverter based on sliding mode control is proposed. The inverter adopts two sets of symmetrical Buck circuits and takes adva...
He Xiaoqing I recently attended the 2010 China Internet of Things Conference held by the China Electronics Society. It was an unprecedented event. The Internet of Things is developing rapidly in Chi...
When I first started learning STM32, I was always worried about where the various library files were. After various debugging, I collected all the libraries used under KEIL and now I have no problem u...
Today's computer peripherals are pursuing high speed and high versatility. In order to meet user needs, seven companies led by Intel launched the USB (Universal Serial Bus) bus protocol in 1994, wh...[Details]
Sailing is gaining more and more attention. How to use modern technology to assist training and improve competition results is particularly important. Considering the real-time data collection in t...[Details]
Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[Details]
The solidification and modularization of intelligent video analysis algorithms are the current trends in the application of intelligent video analysis technology. It perfectly combines intelligent ...[Details]
I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[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]
Introduction
In industrial control, speed measurement is often required. Generally, a contact tachometer is used. This tachometer must be placed against the center of the shaft to measure. It...[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]
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]
At present, single-chip microcomputers have been widely used in home appliances, medical treatment, instrumentation, industrial automation, aerospace and other fields. The more popular types of sin...[Details]
Hollysys' LM series PLC products fully consider the difficulties in integrating machines, equipment and subsystems in large control systems, and provide a variety of open communication protocols and i...[Details]
System Block Diagram
The system uses DSP56F826 chip as the core control module and CMOS digital image sensor chip. The image acquisition resolution can reach 640×480 pixels. When high-re...[Details]
Central topic:
Basic concepts of GSM mobile phones.
Considerations in design and debugging of mobile phone power amplifiers. Considerations in mass production testing of mobile ...[Details]
1 Introduction
At present, with the growing calls for environmental protection and energy conservation, new types of transportation that are pollution-free and have diversified energy configur...[Details]
RF/Wirelessly
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