[i=s] This post was last edited by shaorc on 2018-11-10 10:35 [/i] I want to analyze the infrared alarm circuit in the figure [1] The weak electrical signal output by pin 2 of IC1 is first amplified b...
I want to do a course design! ! A digital display electronic clock based on 51! ! ! ! ! An expert has done it, successfully! ! ! ! Please make one for me (complete circuit diagram, program)! ! ! ! ! :...
[i=s] This post was last edited by dontium on 2015-1-23 13:24 [/i] There are many high-bandwidth op amps, but it is difficult to amplify small signals, especially small signals with high frequencies, ...
I just want to install an infrared pair of tubes inside and outside the door, and add one when someone goes in and subtract one when someone goes out.
I'm not familiar with infrared tubes. Can anyone ...
1 Briefly describeall mid-range PIC microcontrollers. When the highest 4 pins (RB7~RB4) of the PORTB port are set to input mode, when the input level changes from high to low or from low to high, the ...
Forwarding the following positions recruited by Wind River, if interested please add my MSN lishuangwinwin@hotmail.com. LINUX Department 1. LINUX system testing. VXWORK development experience is requi...
A single-chip microcomputer is also called a single-chip microcontroller. It is not a chip that completes a certain logical function, but a computer system integrated into one chip. In general, a c...[Details]
0. Introduction
In daily life, we often see some special-purpose vehicles. When these vehicles pass through intersections, they often obtain the right of way at intersections by temporarily op...[Details]
Do you often have to add brake fluid to your car's brakes? The fact that you need to pump out the brake fluid to make sure there is no gas in the brake fluid line may not be done by the car owner h...[Details]
For a long time, due to the limitation of hardware conditions, the display devices of traditional small handheld devices such as PDA are usually monochrome LCD, and the user interface is very simpl...[Details]
To differentiate their products in a crowded and competitive market, manufacturers of handheld devices often consider battery life and power management as key selling points for cell phones, PDAs, ...[Details]
July 11, 2012, Beijing - Altera Corporation (NASDAQ: ALTR) today announced the launch of 40-Gbps Ethernet (40GbE) and 100-Gbps Ethernet (100GbE) intellectual property (IP) core products. These core...[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]
In the single-chip microcomputer system, in addition to display devices, sound devices are often used, and the most common sound device is the buzzer. Buzzers are generally used for some low-demand...[Details]
The concept of state machine
State machine is an important concept in software programming. More important than this concept is its flexible application. In a clear and efficient program, 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]
Abstract: In order to realize wireless automatic alarm and monitoring of major safety places, based on the basic principle of pyroelectric infrared sensing, a detector for receiving infrared radia...[Details]
LED is now known as the fourth generation of light sources. High-power LED has many advantages over traditional light sources in outdoor lighting.
1 LED lamps have high light efficiency
C...[Details]
This article focuses on closing the feedback loop of an isolated power supply using a TL431 shunt regulator. The article discusses a method to extend the bandwidth of the power supply control loop ...[Details]
introduction
Belt drive is a common transmission device used in industrial production. Its commonly used speed detection device is a photoelectric encoder installed at the rotating end of th...[Details]
introduction
The Steyr diesel engine produced by Weifang Diesel Engine Factory has huge power and is one of the main power models widely used in China's heavy machinery and large trucks. In ...[Details]
Analog electronics
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