3. 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)
4. 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
5. 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
6. • 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
7. 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,
8. • Reading Text/codes:
MICR reader, OMR scanner,
OCR scanner, barcode
reader/scanner
• Sensors
Analogue to Digital
Converter (ADC)
9. 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.
11. • Control Actuators: An actuator is a device
controlled by the computer that can affect
the real-world
Motor, pumps, buzzer, lights, heaters/coolers
