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Keyboard, Mouse and MICR
The document discusses keyboards, mice, and MICR. It provides five discussion items: (1) how standard keyboards work using key matrices, switches, and processors; (2) specialized keyboards like ergonomic, virtual, wireless, gaming, and compact keyboards; (3) how standard mice work using mechanical sensors or optical sensors; (4) specialized mice like inertial, 3D, and gaming mice; and (5) how MICR works to quickly read magnetic ink on checks. Presenters Ali S. Mohammad, Abdul-Moiz, Abdur-Rafey S. Saeed, Mohammed Taha, and Abdullah S. Sheikh lead the discussion.
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Keyboard, Mouse and MICR
- 1. Keyboards, Mice andMICR Presentors: •Ali S. Mohammad •Abdul-Moiz •Abdur-Rafey S. Saeed •Mohammed Taha •Abdullah S. Sheikh
- 2. •Agenda for ourPresentation Keyboards, Mice and MICR Discussion Item One – How does the standard Keyboard Work? Capacitive and the rest Discussion Item Two – Special Keyboards Ergonomic, virtual, wireless, gaming, compact and concept Discussion Item Three – How does the standard Mouse work? Mechanical, optical and laser Discussion Item Four – Special Mice Inertial, gyroscopic, 3-D, tactile, ergonomic and gaming Discussion Item Five – MICR Magnetic Ink Character Recognition Specialized Keyboards Specialized How Keyboards work? How Mice work? MICR Comparison of the allocation of time for each discussion Mice 2 Keyboards, Mice and MICR
- 3. •How does thestandard keyboard work? Hard Contact keys and general The key matrix has switches and circuitry as well as a processor Pressing a key closes a switch and completes a circuit The position of the key is compared to the character map by the processor and sends the correct signal to the computer Rubber dome switches use carbon centres. The Rubber or silicon layer enables the bouncing back Membrane keyboards have no key caps (a continuous flat membrane Metal-contact have pieces of metal on spring-loaded keys The processor filters out ‘bounce’ due to mechanical action Keyboards, Mice and MICR 3
- 4. •How does theStandard Keyboard Work Capacitive keyboards In capacitive, currently constantly flows throughout the key matrix Each spring-loaded key has a metal plate attached it and another on the key matrix below it A key press brings the two plates closer The change in electric current is registered a key press Expensive but longer life No bounce as no mechanical action 4 Keyboards, Mice and MICR
- 5. •How does thestandard keyboard work? Standard Keyboard Today’s keyboards are similar to those of the last 20 years They have 105 keys instead of 95-103 Laying out of keys can change Most use the QWERTY layout(name derived from first 6 letters) Some may have AZERTY layout(reason is the same) Others include QWERTZ and Dvorak Keys can also be changed to suit other languages 5 Keyboards, Mice and MICR
- 6. •Special Keyboards ErgonomicKeyboards These are designed to prevent stress on wrists and fingers They also prevent Carpal Tunnel Syndrome Two types 1. As a single piece where the angle of key placement relieves stress 2. In the form of separate pieces each with a group of keys able to be angled to provide maximum comfort These keyboards are radically different from flat, undivided regular keyboards 6 Keyboards, Mice and MICR
- 7. •Special Keyboards Wireless These do not require wires, instead use Bluetooth, infrared (IR) and radio frequency (RF) Require external power provided by batteries All require a transceiver to connect into a port and relay contact between computer and keyboard Bluetooth keyboards have a 30ft range. Many devices are compatible with Bluetooth Cheap RF keyboards have a 5ft range IR keyboards require to be in the line-of-sight of the transceiver. This is their major drawback, otherwise they have a 12ft range 7 Keyboards, Mice and MICR
- 8. •Special Keyboards Virtualand Internet These are keyboard software apps for mouse or touchscreen Used in devices such as tablets and smartphones where it is impractical to use hardware keyboards Also used for security purposes as anything typed on hardware keyboards is stored on key logs This service is thus provided by Bank ATMs Internet keyboards have hot keys for Internet-related functions These include hot keys for back, forward, bookmarks list, e-mail inbox, Google search, YouTube, online shopping etc. 8 Keyboards, Mice and MICR
- 9. •Special Keyboards Gaming These serve to enhance and make a convenient gaming experience Features include volume control, key lighting, interchangeable keys, mini-touch screens, inbuilt joysticks and fancy lighting etc. These can come in all shapes and sizes (round to v-shaped) This is however mostly nothing but a marketing gimmick Keyboards specialized for specific genres are also available In first-person shooter games, the directional keys are place such that they avoid repetitive stress on the fingers and wrist 9 Keyboards, Mice and MICR
- 10. •Special Keyboards ConceptKeyboards These keyboards have no pre-set keys It uses a touch-sensitive screen with a key/overlay displayed Each key can be programmed to have a variety of functions Used in restaurants where instead of typing, waiters can easily press a single key for each meal. Conveniently pictures or icons can replace words on each virtual key Beneficial for the elderly, especially those with arthritis Touchscreens are increasingly replacing concept keyboards 10 Keyboards, Mice and MICR
- 11. •Special Keyboards CompactKeyboards These are slim and small, hence the name No numeric keypad Mostly used by laptops Multiple keys are used for otherwise single-key functions Some also include a touchpad for a mouse Offer greater portability during travel and storage due to compact design People with hand, finger movement disabilities use these as well 11 Keyboards, Mice and MICR
- 12. •The group hasvoted for Best non-traditional keyboard as.... The main keyboard is divided into two raised and angled parts with a teardrop space in between and raised on an angle. The Numeric Keypad is separated. Add to that wirelessness and you have got ultimate wrist comfort specially for those big typing works. Others that came close include Steel Series Apex, Logitech Wireless All-in- One, Favi Entertainment SmartStick and Martias Laptop Keyboard. 12 Keyboards, Mice and MICR
- 13. •How do StandardMice work? Mechanical, LED/Laser Ball placed underneath rolls with mouse movement Two rollers (90° to each other)measure X and Y movements Movement is measured by a system that includes spinning, hole wielding disks, LED and sensor Sensor’s pulses are converted into binary data and sent ahead LED mice essentially capture many pictures by bouncing LED light off the surface into a CMOS sensor The Digital Signal Processor identifies patterns and changes in each picture relative to the previous one The movement of mouse is thus understood and relayed ahead Laser mice use a laser instead of a LED Ball mice require mouse pads due to their not working on all surfaces. LED/ laser mice work on a wider range 13 Keyboards, Mice and MICR
- 14. •Special Mice Inertialmice, 3D and tactile mice Inertial/gyroscopic mice (‘air mice’) require small wrist rotation and no surface as they use accelerometers and gyroscopes to determine cursor movement This prevents user fatigue and gorilla arm 3D mice record movement in all 6 axes This includes rotation and movement along X,Y, Z axes A consumer-based version is the Nintendo Wii Tactile Mice use a small actuator for vibration in user’s hands This allows the mouse to provide haptic feedback 14 Keyboards, Mice and MICR
- 15. •Special Mice Ergonomicand Games Ergonomic mice provide optimum comfort They minimise injuries such as carpet-tunnel syndrome, arthritis and other repetitive strain injuries One places the palm vertically to prevent crossing of arm’s ulna and radius bones Angling of the mouse reduces wrist pronation Mouse for gamers are ergonomic as they use it for a long time Many have advanced sensitivity for real-time strategy and online battle arena games The number of buttons may increase with game requirements 15 Keyboards, Mice and MICR
- 16. •Special Mice Others Certain mice have extra buttons ranging from the whole keyboard to numeric keypad or a simple scrolling button Some use a trackball place upside down to be used by the fingers without movement of the mouse itself Wireless mice use infrared to relay their movements to a receiver inserted in a USB port instead of a wire Others may use inbuilt Wi-Fi and Bluetooth capabilities 16 Keyboards, Mice and MICR
- 17. •The group hasvoted for • Best non-traditional mice developer as.... 17 Keyboards, Mice and MICR
- 18. •Magnetic Ink CharacterRecognition MICR with the Bank Cheques. MICR is most commonly used by banks It can process 300 cheques per minute with 100% accuracy All cheques carry cheque, bank and customer’s account number This is in magnetic ink (with iron particles in it) It is written in an easily readable, standard font When cheque is placed on the MIC Reader, the magnetic ink creates waves over the reader These waves will not change even if written over with normal ink The font is what enables the quick reading 18 Keyboards, Mice and MICR