OUTPUT DEVICES

OUTPUT DEVICES

An output device is any peripheral that receives data from a computer, usually for display, projection, or physical reproduction.

The main output device is Monitor

OUTPUT DEVICES - VDU, MONITOR ( CRT / LCD / LED / Console / TV / TFT ) these are display devices.

Monitor is a device which convert graphic signal into viewable picturesth that is displayed on flat screen.

Monitor converts Text into Graphics

Difference between CRT and LED / LCD

CRT 

• Old Technology
• Eye Strain due to flickerring
• More heat
• More Space
• More Power Consumption  (approx. 100 watt)        

LED / LCD

• New Technology
• Less Eye Strain
• Less Heat
• Less Power Consumption (approx. 40 watt)      

Some other Output Devices are Monitor, Printer, Speakers, Projectors etc....                                                

JOYSTICKS AND GAMEPADS

JOYSTICKS AND GAMEPADS

These are also input devices. These are used in computer for playing video games. This special hardware only support video games.
        Their shapes, way of use etc.only support video games.
         For Example :

Joysticks

• Wired or Wireless

USB Connectivity

Vibration Feedback

Ease Design and Work

Used in Motion Gaming, Pc gaming, Playstation etc.

Keyboard

KEYBOARD (KEY+BOARD)

Keyboard means a board with lots of keys.

Keyboards come in standard QWERTY patterns.

There are many types of Keyboard

• Standard Keyboard or Normal Keyboard
• Multimedia Keyboard
• Wireless Keyboard
• Foldable Keyboard
• Virtual Keyboard
• On Screen Keyboard (start>> Programs >> Accessories >> Ease of Access >> On Screen Keyboard)
• Mechanical Keyboard etc. 

STANDARD KEYBOARD

This is the most common normal keyboard. It has 105 - 108 keys.

It gets from Rs.150 to 200.

There is no multimedia key in it.

We connect the standard keyboard with the help of Ps / 2 and USB Connector.

MULTIMEDIA KEYBOARD

The device which supports more than one medium is called Multimedia.

Multimedia Keyboard contains more keys which are called Multimedia keys.
like -

Play

Pause

  Stop

Forward

Rewind

Next

Prev

Vol.+

Vol.-

Mute

Calculator

Search

• Multimedia Keyboard is expensive.
• It is connected with the help of PS/2 or USB connector
• It contains 120 to 130 keys.

WIRELESS KEYBOARD (without wire )

Works without Wire It works via Radio Frequency or Bluetooth. This keyboard is expensive.

It works by battery. 

MECHANICAL KEYBOARD

The Mechanical Keyboard is similar to the standard Keyboard.

The only difference is that the keys of the Mechanical Keyboard are raised above.

  

INPUT DEVICES

INPUT DEVICES

An input device is a piece of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or information appliance.

For Example - KEYBOARD, MOUSE, SCANNER, CAMERA, JOYSTICKS AND GAMEPADS etc. 

       The main input device is the keyboard.

Camera

CAMERA

Camera is a input device which complete photos, videos are convert into digital file which is saved in memory.

CAMERA 

• Digital Camera  (Mobile Phones)

• Web Camera (Computer, Laptop)

DIGITAL CAMERA

Specifications 
                         Pixels -- 1MP, 2MP, _ _ _ _ _ _ 40MP etc.

 1 MegaPixel = 10 Lakh Dots (pixels)

 2 MegaPixel = 20 Lakh Dots (pixels)

   3 MegaPixels = 30 Lakh Dots (pixels)

                                                                     etc.

(1) Resolution -  1024 * 768,     7,86,432 pixels

                            1920 * 1080,  20,73,600 pixels

                            2160 * 3840,  82,94,400 pixels 

  HD 

         1280 * 720p  =  9,21,600 pixels

  

FHD  (Full HD)

         1920 * 1080  =  20,73,600 pixels            

UHD (Ultra HD)

         3840 * 2160  =  82,94,400 pixels      etc.

(2) Memory - Inbuilt Memory

                       Add - On Memory (External Memory)

                       Types of Memory (SD card, MMC, Micro SD card)

               

(3) Battery - 1.2 V or  3.6 V  (1.2 + 1.2 + 1.2)     

                     Battery must be great MAH should be high.

(4) Zoom

• Optical Zoom - Zoom before taking photo
• Digital Zoom  -  Zoom after taking photo

       (1x, 2x, 3x,4x, 5x, 8x, _ _ _ _ _ _ _ _ _ etc.)

(5) Video & Photo Quality

            Video means a cluster of too many Photos or Frames

             Video frame rate (30 fps or high)

              Quality of Video Recording 

                                             > SD (640 * 480)

                                             > HD (1280 * 720)

                                             > FHD (1920 * 1080)  

                       Photo means 1 frame (1 fp frame per second)

               Quality of Photo (10 MP, 15 MP, 20 MP _ _ _etc.)

•     Flash,  Auto-Flash,  Night Vision
•     Focus,  Auto-Focus
•     Timer
•     Time & Date Implant
•      Frame
•      Smile Shutter            etc.

WEB CAMERA

Specifications 

• 1 or 2 MegaPixels Camera
• No Memory
• USB Connectivity
• Cost - Starting from Rs 350
• Plug & Play Drivers
• Company - Intex, Adcom etc.
• Inbuilt Mic.
• LED Light for extra light
• Light Sensor
• Used for Online Chatting
• PC connectivity only (works with PC)