External device and peripherals pankaj prasad gupta
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The document discusses external devices and peripherals, explaining their functions as input-output devices that expand a computer's capabilities. It covers the history of external storage devices, from early hard drives to modern USB drives, and highlights the advantages and disadvantages of external drives compared to internal ones. Additionally, it categorizes various types of storage and input/output devices, while also looking ahead to future technological advancements.
External device and peripherals pankaj prasad gupta
- 1. External device and Peripherals Presented by:- • Pankaj Prasad Gupta • Chhavi Gupta • Salman Khan • Deepu • Rajesh Bhaskar • Santosh 106/29/14
- 3. Introduction: External device and peripherals • External device:- A computer interacts with the external environment via the input-output (I/O) devices attached to it. Input device is used for providing data and instructions to the computer. After processing the input data, computer provides output to the user via the output device. • Peripherals:- The I/O devices that are attached, externally, to the computer machine are also called peripheral devices. The term peripheral is used to describe those devices that are optional in nature, as opposed to hardware that is either demanded or always required in principle. 06/29/14 3
- 4. History • The very earliest hard drives were external for all intents and purposes. • This is because they were not mounted within the computer frame. • These devices debuted in the late 1950s, could store 5MB of data and shipped with the first commercially available IBM systems. • Almost 30 years after the debut of those systems, IBM brought out the first gigabyte drive. • This device was the size of a household refrigerator, and was a separate unit from the computer’s.. • Between the debut of the personal computer and the release of what a modern consumer might recognize as an external hard drive, there were several innovations. • However, most of these were strictly for internal drives, as the need for an external drive was not particularly great with early systems. 06/29/14 4
- 5. History • One of the first systems to make use of an external hard drive was Apple. • Apple introduced the ProFile in 1983. • Their computers often had drive bays that were difficult to access, and some had no hard drive within them at all. • This hard drive offered 5MB of disk space, though a 10MB was offered later as an upgrade. • The year was 1998, and a revolution was brewing in the computer industry. This was the time when the USB interface was introduced to computers. • This ground-breaking technology enabled any type of device to connect directly with a computer from the outside, using the same type of interface. • Previously, hard drives made use of a 40-pin connector and a power cable . • This single technology allowed different external hard drive designs to proliferate. It also enabled the birth of other removable media, such as the flash drive. • The first external USB drives were bulky things, due to the technology available in 1998. 06/29/14 5
- 6. About External Device External storage comprises devices that temporarily store information for transporting citation needed from computer to computer. Such devices are not permanently fixed inside a computer. External drives are connected to the computer with a cable plugged into a suitable interface such as an USB port. Data then passes back and forth across the interface. The main advantage of external drives is that they are portable and so data is easily moved from one location to another. External drives also allow safe backup of internally stored data. The main disadvantage compared to an internal drive is data transfer is slower and they also take up space around the computer. Constant plugging in and out can also physically wear out the port over time. 06/29/14 6
- 7. About Peripherals A peripheral device: A hardware component that is attached to a computer in order to expand its abilities and perform additional features. It allows the user to interact with the computer by inputting commands, viewing the screen as well as printing out documents and pictures. It is “additional but not essential”, they are not part of the essential computer as are the processor, and the memory. Some are mounted in the same case with the main part of the computer as are the hard disk drive or CD-ROM drive. Other peripherals are outside the computer case, e.g. the printer and image scanner, attached by a wired or wireless connection. 06/29/14 7
- 8. About Peripherals A peripheral can be an internal or external device. Computer peripherals, or peripheral devices, are sometimes called "I/O devices" because they provide input (e.g. a keyboard / mouse) and output (e.g. a monitor / printer) for the computer. Some peripherals, e.g. external hard drives, provide both input and output for the computer Most devices, whether peripheral or not, require a programme called a device driver that acts as a translator, converting general commands from an application into specific commands that the device understands. 806/29/14
- 9. Types Storage device Magnetic storage Solid state storage Hard Disk Drive Optical storage devices CD DVD flash memory Input /Output Device VDU Scanner Printer Film Recorder Digital Camera Web Camera Etc…. 06/29/14 9
- 10. Storage device HDD A hard disk drive is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. An HDD consists of one or more rigid rapidly rotating disks (platters) with magnetic heads arranged on a moving actuator arm to read and write data to the surfaces. 06/29/14 10
- 11. Storage device SDD: solid-state drive data storage device using integrated circuit assemblies as memory to store data persistently. SSD technology uses electronic interfaces compatible with traditional block input/output (I/O) hard disk drives, thus permitting simple replacement in common applications. SDs are typically more resistant to physical shock, run silently, have lower access time, and less latency 06/29/14 11
- 12. Storage device • USB flash drive A USB flash drive is a data storage device that includes flash memory with an integrated Universal Serial Bus interface. USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc. 06/29/14 12
- 13. External I/O Devices The keyboard It is an input device that allows you to enter alphanumeric data into the computer. It also allows you to edit, correct, change, or modify existing data. The computer mouse It is an input device that allows you to point to items on the monitor in order to perform preprogrammed functions. The computer microphone & speaker It is an device that allows you to enter speech as data hear prerecorded sound, or sound coming over the internet. 06/29/14 13
- 14. External I/O Devices VDU A monitor or a display is an electronic visual display for computers. The monitor comprises the display device, circuitry and an enclosure. Printer A printer is an output device that prints paper documents. This includes text documents, images, or a combination of both. Web Camera The purpose of a webcam is, not surprisingly, to broadcast video on the Web. Webcams are typically small cameras that either attach to a user's monitor or sit on a desk. 06/29/14 14
- 15. Technology Used New Electric Supply Pump for High Pressure Applications Delivers Energy. Advanced CT scanners to reduce radiation exposure. The most commonly computer monitors has resolution for computer monitors is 1920x1080. The most commonly computer mouse are 3D mice ,Tactile mice, Ergonomic mice, Gaming mice. 06/29/14 15
- 16. Current Technology Input / Output Devices Displays devices uses CRT/LED/LCD/Plasma Microphone & Speaker, Ink-jet devices uses flow valves that control machinery Scanners uses Optical Laser which reads bar code Optical mouse uses coherent LASER 06/29/14 16
- 17. Current Technology Connecting peripherals use buses/ports. USB is common to all magnetic disk drives Keyboard uses Switch technology Storage Devices Optical storage devices CD/DVD uses magneto-optic technology Storage devices use magnetic platters 06/29/14 17
- 18. Future Technology Autostereoscopic Display – Conceptual Holographic Display – Conceptual Perceptive Pixel 27" LCD Multi-touch Display - Perceptive Pixel Storage Devices Helium Drive Technology Ethernet Interface Kinetic Drives 06/29/14 18