input and output devices

what is an input device

device that sends data or instructions to a compute system

why are input devices required

allow user to enter data

allow user to control computer

allow computer to catch real world information

what are the examples of input devices

keyboard

barcode scanner

QR code scanners

captures videos or images

microphone

mouse

touch screen

what do keyboard capture

captures text and numeric data

what is an output device

presents data from the computer to the user

what does barcode scanner capture

captures barcode patters (white and black lines)

what does a QR code scanner capture

captures QR code patterns

what does a microphone capture

captures sound waves

what does a digital camera capture

captures images or videos

what does a mouse capture

captures movement by using the reflected light that comes off of the moue

what does touch screen capture

captures the movement and pressure.

why is an output needed

to allow the computer to communicate results with the user

what are the examples of output devices

actuator

printers

screens

speaker

what does an actuator output

produces physical movement, used in washing machines

what is a printer output (there are different types of printers)

inkjet printer → sprays ink droplets

laster printer →uses laser

3D printer → creates 3D objects layer by layer

what does screens output

LED screen

LCD screen

LCD projector

DLP projector

what does speakers output

sound waves

what is a sensor

sensor that detects physical changes n the environment and sends data to a computer

what is the purpose of sensors

collect real time data

monitor environmental conditions

security systems

what are the types of sensors and what are they used for

acoustic → sound levels

accelerometer →acceleration

flow →rate of liquid

gas → gas concentration

humidity → moisture in air

infrared → heat

level → liquid level

light →light intensity

magnetic field → magnetic strength

moisture →water content in soil

ph → acidity or alkalinity

pressure → force per area

proximity → distance to an object

temperature →heat level

where can acoustic be used

voice detection

where can accelerometer be used

fitness trackers

where an flow be used

water pipes

where can gas be used

air quality monitors

where can humidity be used

greenhouse gases detectors

where can infrared be used

remote controls

where can level be used

water tanks

where can light be used

street lights

where can magnetic field be used

metal detectors

where is moisture used

irrigation systems

where is ph used

swimming pools

where is pressure used

tyre pressures

where is proximity used

parking sensors

where is temperature used

thermometer

how are sensors used in systems

when sensors collect the data

it is sent to the computer

computer processes it

performs action if needed