Kan Kaili, Institute of Information Industry Policy and Development, Beijing University of Posts and Telecommunications Original title: 3G and the future of telecommunications industry The key to ...
I use TL494 to generate PWM, but the high and low levels of the output PWM have problems. The high level is 5V, but the low level is not 0V. The output low level is about 700mV. This forces me to add ...
Input 24V AC from output terminal 1; pass through the diode; then output 4MA from output terminal 2; now I don't know what the LM2902 op amp and the transistor inside are used for; please give me some...
I recently started working on DM9000 and needed a TCP data receiving program. However, when connecting, the teacher made an error. I always felt that the program was wrong, but I didn't know where it ...
In recent years, with the increasing demand for manufacturing and automated production management, industrial barcode scanners have gradually become an indispensable part of the industrial manufact...[Details]
While
the solid-state battery
industry is still engaged in a long technological marathon for
the "ultimate solution" for
electric vehicles
, some companies have begun looking for mor...[Details]
Multi-touch mobile phone
Multi-touch is a system that can respond to multiple touches on the screen at the same time. Multi-touch phones are divided into capacitive and resistive types. Capaci...[Details]
On August 18th, Galaxis, a specialist in integrated intelligent intralogistics robotics, officially unveiled its next-generation, ultra-narrow aisle forklift mobile robot, the "VFR Ultra-Narrow Ser...[Details]
Recently, South Korean robotics giant WIRobotics launched its first general-purpose humanoid robot, ALLEX, at the Robotics Innovation Center (RIH) at the Korea University of Science and Technology....[Details]
A half-bridge is an inverter topology for converting DC to AC. A typical half-bridge circuit consists of two controller switches, a three-wire DC power supply, two feedback diodes, and two capacito...[Details]
For today's new energy vehicles, they have different configurations from fuel vehicles, and some configurations have also become a selling point for manufacturers. Compared with traditional vehicle...[Details]
Definitions of VR
, AR, and MR:
What is Virtual Reality?
Virtual Reality (VR), also known as "spiritual realm" or "illusion," is a high-tech technology that has emerged in recent ye...[Details]
introduction
The widespread use of air conditioner communication circuits began with the rise of household inverter air conditioners. With China's energy conservation and emission reduction in...[Details]
introduction
With the development of the information superhighway and the internet, broadcast television has become increasingly widespread worldwide. Television information has emerged in var...[Details]
As the core of electric vehicles, batteries are concerned with vehicle use and maintenance. The operation of vehicles is guaranteed by the electricity generated by batteries. For batteries, battery...[Details]
Pure electric vehicles have experienced rapid growth in recent years, and many consumers now consider them as a top choice when purchasing a car. But do you know how to choose a satisfactory and sa...[Details]
1. Static Balance
Static balancing is performed on one correction surface of the rotor. The remaining unbalance after correction is used to ensure that the rotor is within the specified range ...[Details]
introduction
Due to their flexibility and security, Java cards are increasingly being used in the smart card field. Once a Java card is released, if multiple applications need to call the same...[Details]
introduction
As the concept of "low-carbon travel and green environmental protection" becomes more and more popular, bicycles have become a crucial means of transportation. Currently, urban pu...[Details]
RF/Wirelessly
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