in 1950. * In 1952‚ Ibuka traveled to United States and heard about Bell Laboratory invention of the transistor. He convinced Bell to license the transistor technology to his Japanese company. While most American companies were researching the transistor for its military applications Ibuka and Morita looked to apply it for communications. * They launched one of the first transistor radios in 1955. Soon after they changed the company name to ‘Sony’. * In 1960‚ the Sony Corporation of
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INPUT DEVICES Barcode reader A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner‚ it consists of a light source‚ a lens and a light sensor translating optical impulses into electrical ones. Additionally‚ nearly all barcode readers contain decoder circuitry analyzing the barcode’s image data provided by the sensor and sending the barcode’s content to the scanner’s output port. Biometrics Biometrics[1] (or biometric authentication)[note
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Gas leak detection is the process of identifying potentially hazardous gas leaks by means of various sensors. These sensors usually employ an audible alarm to alert people when a dangerous gas has been detected. Common sensors used today include Infrared Point Sensor‚ Ultrasonic gas detectors‚ electrochemical gas detectors‚ and Semiconductor Sensors. More recently‚ infrared imaging sensors have come into use. All of these sensors are used for a wide range of applications‚ and can be found in industrial
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International Journal of Emerging Technology and Advanced Engineering Website: www.ijetae.com (ISSN 2250-2459‚ ISO 9001:2008 Certified Journal‚ Volume 3‚ Issue 5‚ May 2013) Automatic Street Light Control System Kapse Sagar Sudhakar1‚ Abhale Amol Anil2‚ Kudake chetan Ashok3‚ Shirsath Shravan Bhaskar4 1 Student of Department of Computer Engineering‚ University of Pune (Maharashtra)‚ INDIA Abstract :- Automatic Street Light Control System is not only easiest but also the powerful technique
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moving coil galvanometer. 1 Q. 2. Name the experiment which establishes the wave nature of a particle. Q. 3. Write the S.I. unit for the activity of a radioactive nuclide. 1 1 Q. 4. The a.c. current gain of a transistor is 120. What is the change in the collector current in the transistor whose base current changes by Q. 5. Name the underlying principle of the working of an optical fibre. 1 1 Q. 6. Define ‘dielectric constant’ of a medium. Briefly explain why the capacitance of a parallel plate
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TERM PAPER OF MICROPROCESSOR ON COMPUTER‚MICROCOMPUTER AND MICROPROCESSOR ABSTRACT Microprocessors have evolved dramatically in the twelve years of their development by the implementation of large numbers of devices on single chips. Word widths have increased along with microprogramming capabilities‚ addressing capabilities‚ and trends toward single-chip computers. Only a year after the introduction of 4-bit processors came the 8-bit processor. Three years later‚ in 1974‚ 16-bit processors
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due to their industry standard instruction set‚ and low unit cost. This allows a great amount of legacy code to be reused without modification in new applications. Electrical circuits involving active electrical components such as a displays‚ Transistors‚ Switches & Integrated circuits. The non-linear behavior of these components and their ability to control electron flows make amplification of weak signals possible & is usually applied to
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CONSTRUCTION PC-BASED AUTOMATIC TIME MANAGER ADEEB RAZA M any articles have been published in EFY for control ling devices through a PC’s parallel port or line printer (LPT) port. Here is another project for controlling a school bell or a scheduled shift-timing alarm of a factory automatically. The load connected to the output of the project can be an electric bell or a hooter. The timing can be programmed for every day schedule as per individual requirement. A Windows-based program developed
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FIBCOM 6320 Technical Description 1.3 Abbreviations and Definition of Terms Abbreviations ADM AGGR AIS AUX CF CID CMI CPE CRC-4 DCC ECC ECL EE EEE EMC EOW ER ES ETH ETSI FIT HDB3 HISI ID IEC I/O ITU-T ITU LED LOF MRTIE MSOH MTBF MLM NA NE NRZ OE OEE OEO OHA OS PCB Add/Drop Multiplexer Aggregate Alarm Indication Signal Auxiliary Alarm Connection Field Consecutive Identical Digit Coded Mark Inversion Customer Premises Equipment Cyclic
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Before beginning our research on radio waves‚ to us‚ radio waves were just waves going through the atmosphere‚ carrying sound from one place to another. Those were our ignorant days! We did not realize the complicated terms and theories involved. In the following report you will see how we advanced in our knowledge of radio waves‚ and we hope it will do the same for you. Radio waves are a combination of two kinds of electric vibrations. Audio frequency waves‚ which represent voice and other
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