The access codes for short message services will be adjusted and unified nationwide 2006-7-10The situation where the same short message service provider (SP) gets different service codes on different ...
[align=left][size=4][color=#000000][backcolor=white]Serial interface refers to the sequential transmission of data one bit at a time. Its characteristic is that the communication line is simple. Only ...
With the rapid development of USB technology and flash memory technology, the speed and capacity of mobile storage devices are changing with each passing day. However, the data transmission between th...
CMOS Analog Circuits Video Lecture EECS240 : https://training.eeworld.com.cn/course/4916Analysis and optimized design of integrated analog systems and building blocks.Specific topics include operation...
Question: Where should the coil be placed?answer:Switching regulators for voltage conversion use inductors to temporarily store energy. These inductors are usually very large and must be located in th...
On April 12, the U.S. Environmental Protection Agency (EPA) held a webinar to review the first draft of the Energy Star Smart Home Energy Management System (SHEMS) Version 1.0. This standard is de...[Details]
Recently, the HIFIDIY MINI USB DAC supporting dedicated power upgrade kit was assembled, with an output voltage of plus or minus 9.8V, providing abundant power for the USB DAC.
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1. The pwm output pin of stm32 is the multiplexing function of the IO port used. 2. The four general timers T2~T5 can output 4-channel PWM - CH1~CH4. 3. We take the CH1 PWM output of tim3 as an examp...[Details]
Ultrasonic ranging has many characteristics such as rapidity, convenience, simple calculation and high measurement accuracy. Therefore, it is widely used in reversing radar, rangefinder, mobile robot ...[Details]
Single-phase asynchronous motor speed regulation method
There are several speed regulation methods for single-phase asynchronous motors:
1. Change the power supply voltage: The speed of a...[Details]
Qualcomm Technologies International, Ltd., a world leader in wireless audio, continues to drive technological innovation and delivers a broad portfolio of platforms and technologies to help OEMs meet...[Details]
introduction
With the development of power electronics technology and devices, especially the emergence of new devices such as power MOSFET, IGBT, MCT, IPM and monolithic integrated p...[Details]
Taking the common infrared gas detector as an example, the principle of the gas detector is explained:
Measuring this absorption spectrum can identify the type of gas; measuring the absorption ...[Details]
Circuit principle: When an accident happens while the car is driving, the driver may mistake the accelerator for the brake due to nervousness, and step on it too hard, which often closes the switc...[Details]
Feeling safe, comfortable and secure at home is a necessity for all families; today, this need is met by installing a home alarm system. With the development of home security systems, even if the o...[Details]
Today, many engineers use OTDR fiber optic testers to maintain and locate faults in fiber optic links. In this issue, we will introduce the compensation fiber needed for Fluke OTDR fiber optic testin...[Details]
A new system was built, which uses line laser for real-time 3D reconstruction. It does not need to judge the position every time to start taking pictures. Two proximity switches were added. When the ...[Details]
When the video of replacing the battery of the Lexus CT200h was released, many netizens commented: This is nonsense, hybrid vehicles are not considered new energy vehicles at all. However, the previo...[Details]
A multimeter is a common measuring tool used by electricians. It can be used to measure parameters such as voltage, current, and resistance. A soft starter is a device used to start a motor. It can...[Details]
According to foreign media reports, STMicroelectronics has launched VN9D30Q100F and VN9D5D20FN, which are said to be the first representatives of a new generation of smart switches in the automotiv...[Details]