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Following the release of iOS 14.7.1 last week, Apple has stopped signing iOS 14.7, the previous version of iOS released in early July. Since iOS 14.7 is no longer signed, it is impossible to downgrad...[Details]

    For high-speed digital circuits and systems, signal integrity simulation, design and testing is one of the key points; power integrity simulation, design and testing is another key point, and com...[Details]

Applications require differential measurements in the presence of high common-mode voltages, some of which are hundreds of volts or more. Making accurate measurements at these voltages is difficult a...[Details]

      Researchers at the University of Missouri have demonstrated an exciting pencil and paper combination that can be used to draw devices that monitor people's personal health at home. Currently, t...[Details]

The fault detection test was conducted using two instruments, FLUKF1550 insulation resistance tester and DMH2550 insulation resistance tester, for comparison. The test time was 15s/1min/10min respect...[Details]

1. Introduction to GCC: The GNU Compiler Collection, usually referred to as GCC, is a set of compilers developed by GNU. Why is it an editor collection instead of a compiler? That's because it not on...[Details]

Introduction The two-wire RTD temperature transmitter converts the temperature signal linearly into a 4~20mA DC standard output signal. Most analog two-wire temperature transmitters are compos...[Details]

DC DC motor is one of the main types of motors. Due to its good speed regulation performance, it is widely used in many occasions with high speed regulation performance requirements. DC motors are...[Details]

What is the difference between ARM and microcontroller? 1. Software This is probably the biggest difference. The operating system was introduced. Why was the operating system introduced? What are...[Details]

Analog switches are commonly used in audio systems to switch low-level inputs or adjust audio filter characteristics. Selecting the proper analog switch can help optimize the total harmonic distortion...[Details]

The "Gold Card Project" is one of the important contents of the "Three Gold Projects" and is the only way to move towards an information society. It is closely related to the construction of my count...[Details]

  There are many types of indoor lighting spaces, but when it comes to hotel space lighting , it is definitely a relatively complex type. 　　It includes the warmth of home, the magnificence of s...[Details]

　　At present, there are mainly the following methods to expand the serial port: ①, using serial port expansion chips, such as ST16C550, ST16C554, SP2538, MAX3110, etc. Although the cost is relatively...[Details]

      On the morning of October 22, a video from the Internet showed the disassembly of a suspected iPhone 12. This new phone is equipped with Qualcomm's Snapdragon X55 modem (also known as baseband)...[Details]

#include "sys.h" #include "led.h" #include "delay.h" #include "string.h" #include "USART3_TIM2.h"     char *str_open = "open"; char *str_close = "close";   int main(void) { delay_init(); Led_Heat(...[Details]