The circuit diagram of the wireless measurement node solution's sub-board solution consists of STM32F103CXT+ADF7020 and its peripheral circuits and power supply circuits. It has a USB interface to con...
The rate of posting in this forum has always been a big problem. The main reason may be that you have not received the answer you want. If you have not received an answer for a long time, you can post...
The chip driving the relay can be replaced with 7407. Because the I/O is high when 51 is powered on, the relay will move when using NPN transistors or chips such as uln2003 and 2803, which can sometim...
Almost everyone has a mobile phone, and the standby time of the mobile phone battery has become our biggest concern, especially now that everyone is using smart phones. The battery of a smart phone ca...
The network problem is too serious, haha :) [url=https://bbs.eeworld.com.cn/thread-79898-1-1.html]https://bbs.eeworld.com.cn/thread-79898-1-1.html[/url] All information is here [[i] This post was last...
I want to use an external high frequency 8M crystal oscillator when the MSP430F149 is running normally, switch to 32.768 when in sleep mode, wake up externally and then switch back to high frequency. ...
In early 2002, I started to write a working program for an IC card prepaid electricity meter. The meter used Philips' 8-bit 51-expanded single-chip microcomputer
87LPC764
, and wa...[Details]
1 Introduction
As an emerging microfabrication technology, micro-electromechanical system (MEMS) technology has begun to be applied in various fields. It can integrate functions such as inform...[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]
1 Introduction
Building Automation System (BAS) is a distributed monitoring system (DCS) designed according to distributed information and control theory. It is the result of the mutual de...[Details]
1 Introduction
With the development of control, computer, communication, network technology, etc., a new control technology, namely fieldbus, has emerged in the field of industrial control...[Details]
Flooded Batteries
This battery developed in Germany can be used to power flashlights, strobe lights and toys as long as it is filled with water. This battery can be stored for 50 years and can...[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]
Introduction
Liquid crystal, as a display device, is widely used in low-power products such as instruments, meters, and electronic equipment with its unique advantages. In the past, the displ...[Details]
Capacitors
are basic components in various electronic devices and are widely used for bypassing, coupling,
filtering
, tuning, etc. in electronic circuits. However, to use capacitors,...[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]
With the continuous advancement of various technologies in the field of measurement and control, the baseband subsystem of general measurement and control equipment has entered the fourth generation o...[Details]
Abstract: Based on the ZigBee parking lot SMS car search system, the location of the vehicle in the parking lot is sent to the owner through SMS, which is convenient for the owner to quickly find ...[Details]
1 Introduction
With the rapid economic development, my country's electricity demand has been growing at a rate of more than 20% per year. According to the current economic development trend an...[Details]
1 Load Regulation
Changes in power supply load will cause changes in power supply output. When the load increases, the output decreases, and vice versa, when the load decreases, the output inc...[Details]
In industry, voltage 0…5 (10) V or current 0 (4)…20 mA is usually used as a method for analog signal transmission, which is also a method often used by programmable controllers. So what are the dif...[Details]
ADI Reference Circuit
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