[i=s]This post was last edited by ddllxxrr on 2014-8-26 19:00[/i] There was a skit that asked, "How many steps does it take to put an elephant in a refrigerator?" We know the answer is three. So how m...
Components used: P-channel MOSFET IRF9530, a diode 1N4001, a 5W20 ohm resistor, and a 220V to 15V transformer. Control signal: +12V, -12V for control. Now the connection is as follows: 220 passes thro...
I can't find it, I can't search it, and I can't find it on the official website! Where can I find the routines in the video training? Aunties and gods, please give me some! I always feel that I can on...
As the Internet develops, technical exchanges should become more and more active. Unfortunately, no matter in technical groups, WeChat groups, or BBS, we can find a problem, that is, fewer and fewer p...
I found the 44b0 iic program on the Internet, but when reading and writing E2PROM, I always read out ff. My development board uses st24c08 E2PROM. This problem has bothered me for a long time. I also ...
Caller Identification Delivery (CID) is a service provided by the telecommunications bureau to the called telephone user. It refers to the service that displays the caller's phone number, caller name,...
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]
introduction
In the discharge process of tokamak plasma physics, the study of rupture and sawtooth is of great significance. Rupture and sawtooth exist in most tokamaks. Rupture is a notew...[Details]
Smart lighting control systems provide high controllability for various buildings and further enhance the level of green energy. They are the core products of energy conservation and digital techn...[Details]
With the continuous consumption of earth's energy and the scarcity of resources, the harm of greenhouse effect to human beings, and the serious pollution of the atmosphere to the earth, the intern...[Details]
With the rapid development of intelligent control technology, computers and information technology, the trend of information appliances IA (Information Application), computers and communications integ...[Details]
The traditional display screen using 51 single-chip microcomputer to control LED dot matrix has relatively simple functions. If it is to achieve diversified functions, it often takes a lot of time ...[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]
FPGAs are used in 81% of electronic systems, including many commercial and defense products, and most FPGAs use BGA packaging. The BGA packaging is characterized by small solder balls and small sol...[Details]
hint:
The number of speakers and their spacing limit the sound field of a portable stereo system.
Spatial audio attempts to artificially recreate the experience of listening to sounds i...[Details]
1 Basic Features
In computer control systems and various intelligent instruments and meters composed of single-chip microcomputers (or microprocessors), various external analog signals must be ...[Details]
If a car stereo could play multiple CDs, then such an in-car entertainment system was an advanced system configuration. Today's in-car infotainment systems are complex embedded subsystems that combine...[Details]
0 Introduction
This paper designs a dot matrix LED text display screen that is easy to update, expandable, and low-cost. The ways to reduce costs are: ① Use the Bluetooth data transmission...[Details]
0 Introduction
In the fields of petroleum, chemical industry, metallurgy, electricity, textile, light industry, water conservancy and other industries and scientific research, relevant pressur...[Details]
The active power loss of the power transformer includes two parts: transformer no-load loss and transformer load loss. Under a certain load, the active power loss of the transformer can be expresse...[Details]
Embedded System
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