The polynomial of CRC-16-IBM is x16 +x15 + x2 + 1. Why does Wikipedia give the expression 0x8005 or 0xA001 (0x4003)? The correct calculation should be 0x18005. Is there any explanation for this? Wikip...
I have been developing Android upper layer for 2 years and system layer framework for 3 years. Now I learn drivers by looking at the source code of the system. I can basically understand C language, b...
[size=4][b][font=微软雅黑]The post is located in the [color=#004797][color=#000][color=#000][url=https://bbs.eeworld.com.cn/forum-145-1.html]【TI Analog Technology Experience】[/url][/color] section, the li...
[size=3]File Description[/size] [size=3]When using the ST FOC4.3 library file to control the motor, when using the STM32F30x chip, if the ICS (Isolated Current Sensor) is used to sample the current si...
[img]http://photocdn.sohu.com/20090108/Img261630819.jpg[/img] In a farmhouse in Anqian Village, Sanshan Town, Fuqing, there lived a female dog and a hen. In the past, they were strangers and never saw...
This is my first time to use stm8s. I consulted the information and got a preliminary understanding of stm8s. I feel it is OK. But when I started to work on it, I encountered various problems. I have ...
High efficiency and low standby power consumption are two major challenges in today's switching power supply design. Resonant topology or LLC topology is becoming increasingly popular because it ca...[Details]
Analog engineers have traditionally struggled with complexity when designing power supplies that required multiple outputs, dynamic load sharing, hot-swap, or extensive fault-handling capabilities....[Details]
This paper designs a dot matrix LED text display screen that is easy to update, expandable, and low-cost. The way to reduce costs is
① Use the Bluetooth data transmission function of mobile ph...[Details]
The reason for the light decay of white LEDs: the decline of phosphor performance
So far, the rapid decline of the luminous performance of white light LEDs, especially low-power white light LE...[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 development and widespread application of computer technology, especially in the field of industrial control, computer communication is particularly important. Although serial communication g...[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]
PV inverter manufacturer SMA has launched its first DC arc fault circuit interrupter (AFCI) PV inverter and has received UL certification.
The new SunnyBoy AFCI inverter models include 3000-US...[Details]
Spatial Division Multiplexing (SDM) MIMO processing can significantly improve spectrum efficiency and thus greatly increase the capacity of wireless communication systems. Spatial Division Multip...[Details]
LED guardrail lights use fluorescent tubes or LEDs as light sources and continuous guardrails as carriers to form an approximately linear guardrail light strip. This article mainly introduces...[Details]
LED light sources have many environmental advantages, but early products still have certain technical bottlenecks in heat dissipation and high brightness design that cannot be broken through....[Details]
1 Introduction
Ultrasound refers to elastic vibration with a frequency higher than the audible frequency limit (i.e., in the frequency band above 20 kHz). The propagation process of this vib...[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]
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]
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]