99 000 RPM Contact-Less Digital Tachometer Featuring LCD display and automatic DATA hold function By Ibrahim Kamal Last update: 14/7/10 This article describes how to build a contact -less tachometer (device used to count the revolutions per minute of a rotating shaft) using a 8051 microcontroller and a proximity sensor. As the name implies‚ what makes this device special‚ is that it can very accurately measure the rotational speed of a shaft without even touching it. This is very interesting
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a pair of sensors (Transmitter and receiver) which gives the output to the microcontroller. The timer and the counter of the microcontroller gives the speed of the rotating shaft. The microcontroller is interfaced with an LCD to display the speed. The LCD directly displays the speed of the device in rpm. The controller is selected based on the high processing frequency it needs to meet. The concept of the contact-less tachometer can be enhanced and implemented in industries like recycling facilities
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condition prevails for more than threshold time‚ interrupt signal from the sensor is sent to microcontroller. Microcontroller detects and services the interrupt. Display messages are stored in interrupt service routine. Microcontroller sends corresponding message to alert congestion to GSM modem. The message is also displayed on LCD display. GSM modem transmits the message in form of short message service (SMS) in all receiving modems in surrounding junctions. When other modems receive the message
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………………………….…….....……………………………..17 Fig 3.8 Torque Production in Dc Motor………………………….……………………..….……18 Fig 3.9 Induced Voltage In The Armature Winding Of Dc Motor……..………………………..20 Fig 3.10 Gear Motor - Helical Gear……………………………………..……………….………21 Fig 3.11 LCD Display……………………………………………………………………………22 Fig 4.1 Circuit Diagram………………………………………………………...……….……….26 Fig 4.2 Led Connections…………………………………………………………………………27 Fig 4.3 External Interrupt Connections………………………..……………..…………………..28 Fig 4.4 Max 232 Connections…………………………………
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technology connections. 1.09 Video- CRT (Cathode Ray Tube) and LCD (Liquid Crystal Display) Specifications- screen size‚ contrast ratio‚ refresh rate for CRT‚ response time for LCD‚ interlacing‚ dot pitch‚ pixel pitch and resolution CRT Resolution- 640x480‚ 800x600‚ 1024x768‚ higher is better LCD Resolution- fixed resolution‚ XGA 1024x768‚ SXGA 1280x1024‚ UXGA 1600x1200‚ WUXGA 1920x1200 How to configure display settings- right click on desk top> properties> settings Connectors- analog‚ digital and
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Pub. J. 4(4): 365-374. Retrieve from http://www.bdresearchpublications.com/admin/journal/upload/09182/09182.pdf Abstract LCD Television is the invention of modern technology for the replacement of CRT Television. It is one of the best quality display device which has created a new horizon in home entertainment arena for the population of Bangladesh. But it is really important to know how consumers respond towards the brand features; quality‚ prices‚ and their satisfaction level so that Firms can
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Wireless LED Display Board Using GSM Kamal parmar Kamal parmar‚ M-tech in embedded system‚ Ganpat university‚Ahmedabad. kamal.parmar4@gmail.com Abstract— LED’s are a fantastic way to illuminate any kind of sign‚ be it lettering or panels.LED Dot-Matrix Displays are a common sight now a day on streets‚ malls‚ Buildings‚ parks and other public places. It is a way of visual information where large LCD and other display become too much expensive. My project is based on the wireless LED board
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MODELLING APPLICATIONS * TFT IN LIQUID CRYSTAL DISPLAY FUTURE APPLICATIONS PAPERS AND ARTICLES PUBLISHED OVER THE YEARS.. CONCLUSION REFERENCES INTRODUCTION Over the past 10 years‚ thin film transistors (TFTs) have become critical to the growth and development of the electronic flat panel industry. Today‚ flat panels have become a part of everyday life. From LCD televisions to calculator displays‚ from mobile phones and touch sensitive displays to signboards‚ TFTs are omnipresent. Hence‚ understanding
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Usage of display rules in children Whether people like it or not‚ emotions can get the best of them during rough‚ happy or sad times. How one expresses themselves emotionally during these times is most apparent through speech or facial expressions. Which starting from a young age‚ can be controlled through the use of display rules. Display rules are cultural rules concerning when and how people regulate their emotional expressions in certain situations. Numerous reasons can justify the use of display
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Discuss evolutionary explanations of group displays of aggression The adaptive and functional benefits of aggressive behaviour must outweigh the possible costs in order for it to be favourable. Acquisition of status and access to mates are some of the primary motivators of aggression in non-human animals‚ but there are many theories as to why humans have adapted. One of them is the Power-Threat Hypothesis‚ which represents the fear of a political power being in the hands of a minority group. If a
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