Input and output device(1)

it is a ppt

1. Input and Output Devices NAME – AYUSH SATI CLASS – 9 A ROLL NO. - 20

2. What is it? Input devices are like raw data entered into the computer Then it processes the data and produces outputs that we can understand Processing is mainly handled by the CPU (Central Processing Unit)

3. Input Devices There are two types of input devices, there are so many input devices that they are separated. There is a Manual Input device and an Automatic Input device

4. Manual Input devices Manual Input devices are devices which we have to work out ourselves. They are not automatic and there can be mistakes. Examples: Keyboards: Alphanumeric Keyboard, Numeric keyboard and Pin pad

5. Audio/ Visual Devices Scanner, digital camera, video camera, webcam, microphone Pointing Devices: used in GUIs Mouse, Touchpad/ trackpad , trackball/tracker ball, touch screen, graphics tablet, joystick, joypad , light pen

6. Automatic Input Devices All data can be put into a computer using a keyboard, but would often be slow and there could be mistakes. Automatic input devices can never be wrong, because it is accurate. Examples: Card readers: Magnetic strip reader, smart card/ ‘chip’ reader,

7. Reading Text/codes: MICR reader, OMR scanner, OCR scanner, barcode reader/scanner Sensors Analogue to Digital Converter (ADC)

8. Output Devices The computer communicates with the user by an input device From an input device, the CPU processes it and its results are on the output device. Output  formats are usually printed paper, sound, video and on-screen documents.

9. Examples Audio Visual: CRT monitor, Flat-screen Monitor (TFT or LCD), digital/multimedia projector, speakers. Printing/Plotting: (hardcopy) Dot Matrix Printer, inkjet printer, laser printer, plotter,

10. Control Actuators: An actuator is a device controlled by the computer that can affect the real-world Motor, pumps, buzzer, lights, heaters/coolers