Input and output devices

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  • In this chapter, you learn what is input and output devices. The keyboard is presented and different keyboard types are described. You are introduced to various pointing devices, such as the mouse, trackball, touchpad, pointing stick, joystick, touchscreen, and pen input. Scanners and reading devices, including optical scanners, optical readers, magnetic ink character recognition readers, and data collection devices are explained,...

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  • There exists a range of solutions to reduce exposure to indoor air pollution. This includes reducing the source of pollution and altering the living environment and user behavior. Source reduction involves improved cooking devices (with or without flue attached), cleaner fuel, and reduced need for fire. Alterations to the living environment include improved ventilation and improved kitchen design and stove placement. Altered user behavior includes fuel drying, stove and chimney maintenance, use of pot lids to conserve heat, and keeping children away from the smoke (Bruce et al.

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  • In this chapter, you will: Learn what a stream is and examine input and output streams; explore how to read data from the standard input device; learn how to use predefined functions in a program; explore how to use the input stream functions get, ignore, putback, and peek;…

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  • This book considers electronic devices applied to process analog signals in in strument making, automation, measurements, and other branches of technology. They perform various transformations of electrical signals: scaling, integration, logarithming, etc. Such devices are considered in tutorials on electronics. The need in their deeper study is caused, on the one hand, by the great demands of extending the range of input signals, as well as increasing the accuracy and speed of such devices, which usually receive insufficient attention.

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  • Communication systems consist of an input device, transmitter, transmission medium, receiver and output device, as shown in Fig. 1.1. The input device may be a computer, sensor or oscillator, depending on the application of the system, while the output device could be a speaker or computer. Irrespective of whether a data communications or telecommunications system is used, these elements are necessary.

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  • Introduction to Computing: Lecture 3 - Computer Hardware of Dr. Pham Tran Vu provides about Computer Systems (Input, Main memory, Central Processing Unit, Output, Backing storage, eripheral devices), Computer Architecture, Input and Output Devices, Storage Systems.

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  • Most input/output devices reside the computer case. These devices communicate with what is inside the computer case through cables attached to the case at a connection called a port, sending data and/or instructions to the computer and receiving them from the computer. Most computers have their ports located on the back of the case, but some models put the ports on the front of the case for easy access. The most popular input devices are a keyboard and a mouse, and the most popular output devices are a monitor and a printer. The keyboard is the primary input devices of a computer.

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  • The amount of knowledge an electrician must possess to be able to install and troubleshoot control systems in today’s industry has increased dramatically in recent years. A continuous influx of improved control components allows engineers and electricians to design and install even more sophisticated and complex control systems. Industrial Motor Control presents the solidstate devices common in an industrial environment.

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  • Power amplifiers consist of an active device, biasing networks and input and output reactive filtering and transforming networks. These networks are effectively bandpass filters offering the required impedance transformation. They are also designed to offer some frequency shaping to compensate for the roll-off in the active device frequency response if broadband operation is required. However the function of each network is quite different. The input circuit usually provides impedance matching to achieve low input return loss and good power transfer. ...

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  • Linux History Design Principles Kernel Modules Process Management Scheduling Memory Management File Systems Input and Output Interprocess Communication Network Structure Security To explore the history of the UNIX operating system from which Linux is derived and the principles which Linux is designed upon To examine the Linux process model and illustrate how Linux schedules processes and provides interprocess communication To look at memory management in Linux To explore how Linux implements file systems and manages I/O devices...

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  • After converting your network from hubs to switches you may find it difficult to use your protocol analyzer to observe traffic between devices. Since switches filter traffic based on the MAC address, you can no longer see traffic destined for a device on a particular port on any of the other ports. You need to setup a port on your Ethernet switch as a “Monitor” or “Span” port. Once you have designated a port on your switch as a monitor port, you can copy input and output traffic from another port to your monitor port....

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  • The task of the lab is to implement a classic video game using Spartan3 FPGA on a Xess XSA-3S1000 board. Input device for the game is a PS/2 keyboard and output device is a VGA monitor.

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  • CHAPTER 9 COUPLING, CLUTCHING, AND BRAKING DEVICES COUPLING OF PARALLEL SHAFTS Fig. 1 One method of coupling shafts makes use of gears that can replace chains, pulleys, and friction drives. Its major limitation is the need for adequate center distance. However, an idler can be used for close centers, as shown. This can be a plain pinion or an internal gear. Transmission is at a constant velocity and there is axial freedom. Fig. 2 This coupling consists of two universal joints and a short shaft.

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  • Program design of small programs is relatively simple and involves the analysis of the problem, collection of inputs, using the programming constructs within languages, devising or using established procedures and algorithms, providing data for output devices and solutions to the problem as applicable. As problems become larger and more complex, features such as subprograms, modules, formal documentation, and new paradigms such as object-oriented programming are encountered. Large programs involving thousands of line of code and more require formal software methodologies.

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  • This chapter will describe the important linear parameters which are currently used to characterise two port networks. These parameters enable manipulation and optimisation of RF circuits and lead to a number of figures of merit for devices and circuits. Commonly used figures of merit include hFE, the short circuit low frequency current gain, fT, the transition frequency at which the modulus of the short circuit current gain equals one, GUM (Maximum Unilateral Gain), the gain when the device is matched at the input and the output and the internal feedback has been assumed to be zero....

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  • Programmable Logic Controllers (PLCs), also referred to as programmable controllers, are in the computer family. They are used in commercial and industrial applications. A PLC monitors inputs, makes decisions based on its program, and controls outputs to automate a process or machine.

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  • CODING TECHNIQUES Many errors in a computer system are committed at the bit or byte level when information is either transmitted along communication lines from one computer to another or else within a computer from the memory to the microprocessor or from microprocessor to input/ output device. Such transfers are generally made over high-speed internal buses or sometimes over networks. The simplest technique to protect against such errors is the use of error-detecting and errorcorrecting codes.

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  • The microcontroller is an exciting new device in the field of electronics control. It is a complete computer control system on a single chip. microcontrollers include EPROM program memory, user RAM for storing program data, timer circuits, an instruction set, special function registers, power on reset, interrupts, low power consumption and a security bit for software protection. Some microcontrollers like the 16F818/9 devices include on board A to D converters.

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  • A PLC or programmable controller is a computer based solid state device that controls industrial equipment and processes. Initially designed to perform the logic functions executed by relays, drum switches and mechanical timer/counters, it has been extended to analog control as well. A typical PLC system consists of a processor and an input/output system all mounted in a rack like system. The PLC system is a cost effective solution for applications with a high ratio of digital to analog points in a system.

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  • A modem computer consists of one or more processors, some main memory, disks, printers, a keyboard, a mouse, a display, network interfaces, and various other input/output devices. All in all, a complex system. If every application programmer had to understand how all these things work in detail, no code would ever get written. Furthermore, managing all these components and using them optimally is an exceedingly challenging job.

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