[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...
At present, the development of wireless power supply technology for electric vehicles (EVs) is becoming more and more active. In 2012, Volvo of Sweden established Volvo Technology Japan in Tokyo as...[Details]
China's new energy vehicles are in a transition period from research and development to real industrial development. In 2012, with the intensive launch of new energy vehicle policy planning, the de...[Details]
1. Introduction
Since the 1980s, with the continuous development of automotive electronic technology, there are more and more electronic control units in automobiles, such as electronic fuel i...[Details]
Automotive applications are particularly sensitive to EMI events, which are unavoidable in a noisy electrical environment consisting of a central battery, bundled wiring harnesses, various inductiv...[Details]
System design is a complex process. It is not enough to just use ICs. There are many details to consider. This article uses a high-fidelity music playback system as an example to introduce how to s...[Details]
In order to highlight the concept of "energy saving and environmental protection" of intelligent buildings, solar street lights are designed for intelligent communities. The inclination and capacit...[Details]
introduction
For the voltage regulator modules (VRMs) that power the latest computer central processing units (CPUs), power supply designers have historically used multiphase interleaved b...[Details]
In recent years, lighting has become an important area that countries around the world are targeting to promote energy conservation and environmental protection. According to statistics, about 20% ...[Details]
Although it is relatively easy to check the stability of a simple amplifier at lower frequencies, it may be much more difficult to evaluate the stability of a more complex circuit. This artic...[Details]
From the PIC16F946 datasheet, we know that there are two ways to write values to the LCD for display:
1. Directly write the value to LCDDATA1~LCDDATA23
2. Use disconnect t...[Details]
Printed circuit boards ( PCBs
)
are used in most electrical products
. If a PCB has low
insulation resistance
(IR), the performance of the circuits on the PCB will be greatly reduced...[Details]
Abstract: The output of high-range acceleration sensor is less than 10 mV under the excitation of small signal. The noise of traditional test system may cover such small voltage signal, so that hig...[Details]
LED lighting: Basic circuit design can be completed in as little as one day
Semiconductor manufacturers are also getting involved in the LED lighting business. The power circuit of LED req...[Details]
Introduction
Nowadays, people pay more and more attention to the security alarm system, and people have higher and higher requirements for the functions and performance of the alarm. This paper prop...[Details]
With the rapid development of cities and the improvement of citizens' living standards, the number of various vehicles in cities is growing, and the demand for parking spaces in major commercial an...[Details]
Analog electronics
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