The product uses an 8.4V lithium battery, which has three metal spring contacts, similar to the battery contact method on a mobile phone. The current circuit has two 220UF/16V tantalum capacitors in p...
In recent days, when I opened my phone, I was flooded with news about iPhoneX. Yesterday, a video of a foreigner unboxing the phone was leaked online. I didn't expect that although the nearly 10,000 y...
How to burn the program written by ads into the nandflash of arm2440! Help! I have a compiled ads program of 2MB in size. It runs fine in SDRAM. Now I want to burn it into the chip, but it can't burn ...
How to understand embedded systems ◆Embedded systems are user-oriented, product-oriented, and application-oriented. They must be combined with specific applications to be vital and have more advantage...
There is no problem in compiling, but it does not display. I am a novice, please help me. The program is as follows: //lcdportconfig.h #ifndef _LCDPORT_CONFIG_ #define _LCDPORT_CONFIG_ #include
//Hard...
Why do we need to debounce buttons?Key debounce The switch used for the common keys is a mechanical elastic switch. When the mechanical contacts are opened and closed, due to the elastic effect of the...
Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[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. 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]
A standard cell
is an electrochemical
cell
used as a voltage reference standard in many electrical standards laboratories
. If properly maintained, standard cells are very stable. The ...[Details]
1. System Structure
This system is a simulation system of indoor air-conditioning temperature/humidity control system. The data acquisition and control center collects temperature/humidity...[Details]
I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[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]
1. Overview
At present, an information revolution is in the ascendant around the world, led by microelectronics, computers and communication technologies, and centered on information technolog...[Details]
1 Introduction
With the improvement of people's quality of life, lamps are no longer just basic indoor lighting tools, but also a kind of practical art for architectural decoration. When ther...[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]
The DisplayPort interface standard is approved by the Video Electronics Standards Association (VESA) to provide an open, scalable standard for the entire industry. The development of DisplayPort ca...[Details]
Overview
By transmitting ultrasonic energy into the human body and receiving and processing the returning reflected signals, phased array ultrasound systems can generate images of organs and s...[Details]
Against the backdrop of global warming, energy conservation and emission reduction have become a global hotspot and focus, which has also sounded the clarion call for the take-off of the LED lighti...[Details]
Analog electronics
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