Page 225 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Application:
You will find all the android applications at the top layer and you will write your application and install it on this
layer. Examples of such applications are contacts, books, browsers, services, etc. Each application performs a
different role in the overall applications.

Function Of Smartphone Components.
Processor (CPU): The processor is the brain of the smartphone, responsible for executing instructions and
processing data. It performs tasks such as running applications, handling user input, and managing system
resources.
Memory (RAM): RAM (Random Access Memory) is used to temporarily store data and instructions that the
processor needs to access quickly. It allows for faster multitasking and smoother performance by providing quick
access to frequently used information.
Storage (ROM): ROM (Read-Only Memory) is used to store the operating system, system files, and user data
such as apps, photos, and videos. It provides long-term storage for data even when the device is powered off.
Display: The display is the screen that shows visual output to the user. It allows users to interact with the device
through touch input and provides visual feedback for apps, videos, games, and other content.
Battery: The battery provides power to the smartphone, allowing it to operate without being connected to a power
source. It stores electrical energy and powers the various components of the device.

Sensors: Smartphones contain various sensors that provide input to the device and enable features such as
orientation detection, motion sensing, proximity sensing, ambient light sensing, and fingerprint recognition.
Camera: Smartphones typically include one or more cameras for capturing photos and videos. Modern smartphones
often feature advanced camera systems with multiple lenses, image stabilization, and high-resolution sensors.
Connectivity Modules: Smartphones include various connectivity modules such as Wi-Fi, Bluetooth, GPS, and
NFC (Near Field Communication). These modules allow users to connect to wireless networks, transfer data
between devices, navigate using GPS, and make contactless payments.
Audio Components: Smartphones include speakers, microphones, and audio jacks (or wireless connections like
Bluetooth) for playing audio, making phone calls, and recording sound.
Operating System: The operating system (e.g., Android, iOS) manages the smartphone’s hardware and software
resources, provides a user interface, and supports the installation and execution of applications.
These components work together seamlessly to provide a wide range of functionalities, allowing users to
communicate, access information, navigate, capture memories, and perform various tasks using their smartphones.
Wi-Fi, short for Wireless Fidelity, is a technology that allows electronic devices to connect to a wireless local
area network (WLAN) using radio waves. It enables devices such as smartphones, laptops, tablets, and other
wireless-enabled devices to access the internet, communicate with each other, and share data without the need
for physical wired connections
Concepts Of Wi-Fi:

We all know about Wi-Fi, in our mobile, laptop everywhere Wi-Fi is supported. Wi-Fi is a wireless networking
technology, by which we can access networks or connect with other computers or mobile using a wireless medium.
In Wi-Fi, data are transferred over radio frequencies in a circular range.
Wi-Fi, a brand name given by the Wi-Fi Alliance (formerly Wireless Ethernet Compatibility Alliance), is a generic
term that refers to the communication standard for the wireless network which works as a Local Area Network to
operate without using the cable and any types of wiring. It is known as WLAN. The communication standard is
IEEE 802.11. Wi-Fi works using Physical Data Link Layer.
Nowadays in all mobile computing devices such as laptops, mobile phones, also digital cameras, smart TVs
has the support of Wi-Fi. The Wi-Fi connection is established from the access point or base station to the client
connection or any client-to-client connection within a specific range, the range depends on the router which
provides the radio frequency through Wi-Fi. These frequencies operate on 2 types of bandwidth at present, 2.4
GHz and 5 GHz.
All the modern laptops and mobiles are capable of using both bandwidths, it depends on the Wi-Fi adapter which
is inside the device to catch the Wi-Fi signal. 2.4 GHz is the default bandwidth supported by all the devices. 2.4

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CITS : E & H - Electronics Mechanic - Lesson 130 - 145