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Digital Devices (Storage Devices (CD (A CD a small plastic disc on which…
Digital Devices
Storage Devices
CD
A CD a small plastic disc on which music or other digital information is stored in the form of a pattern of metal-coated pits from which it can be read using laser light reflected off the disc.
DVD
Digital Versatile Disk is basically the same as a CD, but DVD’s can hold much more storage
ROM
It's used to store the start-up instructions for a computer, also known as the firmware. Most modern computers use flash-based ROM.
SSD
SSD is the same thing as the HDD the only difference is SSD does not use moving objects like HDD. This makes the SSD very much faster than the HDD. SSD uses Flash Memory
RAM
RAM is the hardware in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device’s processor.
HDD
The Hard Drive is a spinning disc of magnetic material on which your OS, applications, and data are stored while the machine is powered down.
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SSHD
SSHD stand for solid-state hybrid drive. It's a traditional hard disk with a small amount of solid-state storage built in, typically 8GB or so. The drive appears as a single device to Windows (or any other operating system), and a controller chip decides which data is stored on the SSD and what's left on the HDD.
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Sensors
Motion Sensors
A motion detector is a device that detects moving objects, particularly people. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
Pressure Sensors
A pressure sensor is a device for pressure measurement of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding and is usually stated in terms of force per unit area. A pressure sensor usually acts as a transducer, it generates a signal as a function of the pressure imposed.
Temperature Sensors
A temperature sensor is a device, typically, a thermocouple or RTD, that provides for temperature measurement through an electrical signal. A thermocouple (T/C) is made from two dissimilar metals that generate electrical voltage in direct proportion to changes in temperature.
Humidity Sensors
Humidity Sensor is one of the most important devices that has been widely in consumer, industrial, biomedical, and environmental etc. applications for measuring and monitoring Humidity. Humidity is defined as the amount of water present in the surrounding air.
Light Sensor
The light sensor is a passive device that convert this “light energy” whether visible or in the infra-red parts of the spectrum into an electrical signal output. Light sensors are more commonly known as “Photoelectric Devices” or “Photo Sensors” because the convert light energy (photons) into electricity (electrons).
Types of Interface
Graphical User Interface
The graphical user interface is a form of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation.
Menu Driven Interface
Menu Driven Interface. This type of interface lets you interact with a computer or device by working your way through a series of screens or menus. Think about your iPod or mobile phone, they both use a menu driven interface. You are presented with a menu, you make a choice and then the next menu appears on the screen.
Voice Interface
A voice-user interface makes human interaction with computers possible through a voice/speech platform in order to initiate an automated service or process.
Command Line Interface
A command-line interface or command language interpreter is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text
Gesture Interface
Gesture recognition is a topic in computer science and language technology with the goal of interpreting human gestures via mathematical algorithms. Gestures can originate from any bodily motion or state but commonly originate from the face or hand.
Types of computers
Personal Computer
A personal computer is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.
Mainframe Computer
Mainframe computers are computers used primarily by large organizations for critical applications like bulk data processing, such as census, industry and consumer statistics, enterprise resource planning and transaction processing.
Super Computer
A supercomputer is a computer with a high level of performance compared to a general-purpose computer.
Super computers are the fastest computers in the world.
Microprocessors
A microprocessor is a computer processor that incorporates the functions of a central processing unit on a single integrated circuit or at most a few integrated circuits. The microprocessor is a multipurpose, clock driven, register based, digital integrated circuit that accepts binary data as input. A microprocessor is the brain of an digital device.
Input Devices
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Mouse
A small handheld device which is moved across a mat or flat surface to move the cursor on a computer screen.
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Joystick
A pointing device used to move an object on screen in any direction. Joysticks are used extensively in video arcade games
Output Devices
Speakers
Speakers are one of the most common output devices. The purpose of speakers is to produce audio output that can be heard by the listener.
Headphones
A device consisting of a pair of earphones joined by a band placed over the head, for listening to audio signals such as music or speech.
Moniter
The monitor displays the computer's user interface and open programs, allowing the user to interact with the computer, typically using the keyboard and mouse.
Pointing Devices
Tracker ball
A small ball that is set in a holder and can be rotated by hand to move a cursor on a computer screen.
Touch Pad
A computer input device in the form of a small panel containing different touch-sensitive areas to move the cursor on a computer screen.
Mouse
A small handheld device which is moved across a mat or flat surface to move the cursor on a computer screen.
Joystick
A pointing device used to move an object on screen in any direction. Joysticks are used extensively in video arcade games.