A microphone, an ultrasonic transmitter, a controller, and other discrete components. When something hits a glass, the microphone receives the sound wave signal, which is analyzed by the controller to...
, implement the programming of 8255 three ports, output data from one port and input data from another port, and judge whether the input data and output data match. If they match, then conversely, out...
I used two ADC channels and found that when collecting the same signal, the ADC reading of one channel was always 20-30 more than the other.
Has anyone ever encountered such a situation?
Let’s talk ab...
Incremental encoder, read pulses and count through CPLD. Later, I found a strange phenomenon. The encoder started at a position, and after multiple forward and reverse rotations, it returned to the or...
On October 25, 2020, Samsung Electronics announced that its chairman Lee Kun-hee had passed away due to illness. Since he was hospitalized for a sudden heart attack in 2014, the 70-year-old man has be...
An Introduction to Digital Control of Switching Power ConvertersGeof PotterApplying digital methods to the control of power converters, in particular board-mounted dc/dc converters, offers a rich set ...
Microcontrollers (MCUs), which are widely used in automotive electronics, are rapidly facing time and cost pressures. The main advantage of using MCUs has always been to create high-level system in...[Details]
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]
When choosing a laptop battery, you should consider several factors, such as power, appearance, and quality.
Regarding power, we often see that a manufacturer uses values such as the number ...[Details]
Battery life is critical for portable applications. For applications such as smoke detectors, security devices, and thermostats, factory-installed batteries need to last for more than 10 years. The...[Details]
With the continuous improvement of the requirements of intelligent building security systems and the continuous improvement of people's safety awareness, indoor anti-theft has gradually attracted peop...[Details]
We know that microcontroller development tools generally include real-time online emulators and programmers. Among them, online emulators are very good tools, but they are also more expensive...[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]
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]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Single-chip microcomputers are widely used because of their small size, powerful functions and low price. This article introduces the method of designing a micro electronic piano using the AT89C51 sin...[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]
LED technology has made rapid progress, and improvements in chip design and materials have promoted the development of brighter and more durable light sources, and the scope of light source applica...[Details]
0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
1. Proposal of
reconfigurable
measurement and control system
The measurement and control system generally refers to a system based on
computers
to realize data acquisition a...[Details]
0 Introduction
Ultrasonic waves
are mechanical waves with a frequency of more than 20KHz, and the propagation speed in the air is about 340 m/s (at 20°C). Ultrasonic waves can be gene...[Details]
DIY/Open Source Hardware
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