Mobile Phone LOI 2
Digital communication also allows for more secure phone calls and conversations as people can't listen to them using a scanner. if we use digital communication, then we can communicate from anywhere in the world as it uses satellites to transmit the signals from our phone's antenna. A subscriber module identity card (aka sim card) is used. Earlier it was as big as a credit card and a microchip which allowed access to the satellite which transmits the radio signal that the phone sent.
Microprocessor - All digital devices have an IC that processes programs - and also some instructions make the device work
Transistors are found in integrated circuits. These are made from pure silicon. The current flow through the transistors from the term “Source” to “Drain” but only if there is an electric field applied called “gate”
When a phone number is tapped into the keys of a telephone, it sends a series of electrical signals along the telephone network to an exchange.
An LCD screen contains millions of tiny pixels that make the picture move
A microphone allows a smartphone to function as a telephone
A smartphone combines the feature of the telephone and a computer
Satnav is a satellite navigation chip connects a network of satellites in orbit such as GPS
All smartphones have a camera but most of them have a digital camera with zoom feature and recording feature
Smartphone can make contactless payments via methods including radio system
Analogue to Digital - The analogue-to-digital chip takes the information from the real world and then it converts it to binary codes numbers.
Cell phones contain 3.8V of electricity.
Today mobile phone allows people to make and receive calls using invisible radio signal
Loudspeaker is build into the the phone to provide sound for calls and media
Before smartphones, there were telephone booths.
Silicon chips form building blocks to make the software run
When a message is sent, it travels as codes of radio waves into the nearest cell phone tower and transfers it to the next person's phone.
HDTV means the screen has fewer pixels and shows the picture more clear
Mobile phone have two types of display:
LCD and LED
Today mobile phone allows people to make and receive calls using invisible radio signal
Internet is connect with smartphone using wifi or cellular data
phones were converted into smartphones. Smartphones also allow us to do many things, not only phone calls but smartphones are like computers.
The way a chip works is the result of how a chip’s transistors and gates are designed and the ultimate use of the chip.
Most smartphone feature electronic address books where contact
There are 3 colours in a pixel red, blue and green
Pixels twist when electricity passes through them to let different amounts of light
When there's an incoming call, the computer sends it to the area that contains the correct phone, making it ring.
When there's an incoming call, the computer sends it to the area that contains the correct phone, making it ring.
Bluetooth chip allows the phone to connect wirelessly to other devices
Flash Memory Chip - FMC is found in USB storage, digital camera, and solid-state hard drives, flash chips can store much information.
Today mobile phone allows people to make and receive calls using invisible radio signal
Text messaging involves sending and receiving messages
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Your electronic cracks when it is cloudy or rainy because the satellite radio waves are blocked and can't get through.
Today mobile phone allows people to make and receive calls using invisible radio signal
Digital to Analogue - A digital-to-analogue chip processes digital sound - 1s , 0s that make signals and send it to the loudspeaker.
Credit cards contain balance on a single silicon chip.
Your electronic cracks when it is cloudy or rainy because the satellite radio waves are blocked and can't get through.
Silicon chips are used to hold large quantities of data/information.
Silicon chips are used to hold large quantities of data/information.
Cell phones mostly contain silicon, plastic, iron, aluminium and copper