Summary
Summary Input and Output Devices Notes
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Detailed Notes on Input and Output Devices.
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At the core of a computer system is a processor and in many ways the processor is the computer.All the other hardware components are required to enable the processor to enable it to function
(Process data).
A processor takes data, processes it then outputs different data.
There are many different types of hardware that exist to input and output data.
Input Devices
o Physical Input devices
Trackpads
Newer trackpads can detect the location of a finder and the amount
of force of the press plus multi touch gestures.
Mouse
Touchscreens
Keyboard
o Optical input devices
Digital cameras
They use a chip to convert photons of light into a digital signal
Document scanners
o Audio input devices
Microphone
Used for text to speech translation with digital assistants
o Specialist input devices
Motion tracking
3D Scanner
Industrial
Hand held
Biometric Scanner
Finger print
Iris
Face
Heart rate
Gesture recognition
Eye
Gaze tracking
Virtual reality
o Capacitive touchscreens tend to be more responsive and provide clearer images
o Digitising sound
To represent sound digitally a diaphragm detects changes in air pressure,
the diaphragm moves a magnet through a coil that changes the current in
the wire.
Output Devices
o Sight – Visual Output
Screens
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