Computer Hardware Input Devices An input device is a peripheral device that converts symbols that people understand into bits that computers can process. An input device includes a terminal, a touch screen, a mouse, a scanner, etc. Keyboard Entry In keyboard entry, a user types characters, numerics and special symbols using a keyboard. The input usually appears on a monitor. A keyboard entry might be the most common way to input data. Keyboards A keyboard in a device used to encode data by
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I/O Devices Professor Mo Suleiman I/O Devices An I/O device is defined as “any of various devices (including sensors) used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases, a machine controlled by the computer.” (Britannica, 2014) With that information presented, the critical I/O devices needed for the computer are a mouse and keyboard. They are both necessary because they are input devices
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Computer Structure and Logic Input Keyboard: This is used to input letters and numbers into programs or applications wired or wirelessly. Microphone: This can be used to record sound and then be saved in a file on the computer. Mouse: This is used to navigate through applications or open and close files in your computer. Camera: This is used to take pictures then can be hooked up to a computer to transfer the pictures from the camera to the computer. Webcam: This is used in live conversations
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logic gate (AND, OR, XOR, NOT, NAND, NOR, and XNOR) AND | OR | XOR | NOT | NAND | NOR | XNOR A logic gate is an elementary building block of a digital circuit . Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately
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History of Computers Carving notches into bones • 20,000 BC to 30,000 BC • Oldest known objects used to represent numbers • Discovered in Western Europe, date from the Aurignacian period correspond to the first appearance of Cro-Magnon man (caves of the same name in Southern France, in which the first skeletons of this race were discovered in 1868.) Abacus • 1000-500 BC • First actual calculating mechanism • Babylonians or Chinese Mechanical Calculator • 1500 AD, Leonardo
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Computer Information Paper Computer information can be input in several different manners. Data may be input through a keyboard which is a device that allows the user to type the information directly into the computer. The keyboard is the most common and most utilized input device. An example of when the keyboard would be the best input device is printed questionnaires. Answering a questionnaire or conducting a telephone survey could be accomplished quickly and easily by simply typing the necessary
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Working Storage -RAM Input Devices -Keyboard -Mouse Input Devices -Keyboard -Mouse Output Devices -Monitor -Printer Output Devices -Monitor -Printer Permanent Storage -Hard Disk -CD-ROM
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Universal Measuring Device UMG96S Operating instructions Brief instructions see last page Mean value Programming mode Sum measurement L-L L1-N / L1-L2 L2-N / L2-L3 L3-N / L3-L1 Password Voltage transformer Current transformer Output 1 Output 2 Dok Nr. 1.028.027.2 Peak value high rate/Consumption Min. value Supply low rate/supply Key1 Key 2 Janitza electronics GmbH Vor dem Polstück 1 D-35633 Lahnau Support Tel. (0 64 41) 9642-22 Fax (0 64 41) 9642-30
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Arithmetic Unit These two made up the CPU Input Devices Keyboard -Mouse Working Storage RAM As time went on there were minor changes to the von Neumann model but the biggest change was the combination of the Control Unit and the Arithmetic unit into a single unit, that we refer to now as the CPU or processor. Here is a diagram of the current von Neumann diagram that is still in used today. Permanent Storage HD - CD/DVD Disk Output Device Printer - Monitor CPU From the
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logic gate (AND, OR, XOR, NOT, NAND, NOR, and XNOR) AND | OR | XOR | NOT | NAND | NOR | XNOR A logic gate is an elementary building block of a digital circuit . Most logic gates have two inputs and one output. At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels. The logic state of a terminal can, and generally does, change often, as the circuit processes data. In most logic gates, the low state is approximately
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