The document discusses the key components of a cell phone and how they enable communication. It describes how the microphone converts sound signals to electrical signals, and the speaker converts electrical signals back to sound. It also mentions the display, keypad buttons, battery, and camera as important parts of a mobile phone. Faults can occur if components like the microphone or battery are damaged.

4. Enables To
Communicate
The cell phone was invented by
Dr. Martin Cooper.

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6. A Mic is also called microphone and mouthpiece .
Converts to
Sound signal electrical signal
FAULT - If the mic get damaged ,our voice will not be heard by the other person
during the Call .

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8. Converts to
electrical signal Sound signal
We hear the voice of the other
person during a call from the
speaker

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10. Display is of 2 types :
Color Display
Black and white display
Color Display Black and white

12. It is just like a normal on-off switch . When we press
The buttons of the keypad , the two connectors
contact With each other . The carbon in between
makes this Possible . When we press the button the
carbon shorts its point and create signal .

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14. It is of two types
1.Loose
2.Solder
FAULT – Mobile phone will become dead.
Mobile phone will switch off automatically.
Battery discharge problem.

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16. It supplies voltage from the charger to the battery.
It is of two type
1.Loose
2.Solder

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18. Ic connected
through balls
below the IC
Ic connected
through pins on
the side

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20. There are many types of batteries used in mobile phone but now a days the
most popular batteries are “lithium Ion battery ” and “Lithium Ploymer battery”.
There are two types of batteries according to their terminals.
In Sony Ericson mobile phone there are five pins used
For battrey terminal but don’t be confuse . First two pins
Are +ve third works as BSI and the last 2 bins are -VE

21. + - + -B TEMP
BSI BSI
Positive pin(+)
Positive pin of battery gives output
voltage which is normally 3.6 V or
3.7V. + -
Negative pin(-)
Negative pin is battery is same as in
other batteries.
+ -
BSI pin
BSI stands for Battery State Indicator
. This is a pin which tells the mobile
phone cpu the state of battery + -
(tempereature).

22. Do we ever think how the camera of a mobile
phone work ??
Camera used in cell phone is a digital camera. Unlike analog
or classic cameras, there are no film In digital camera. Instead
of film, there are lots of chips.
They can be CCD(Chare-Couple Device), CMOS(Complementary
Metal Oxide Semiconductor) etc. There is also digital sensors with
pixels laid on them.
The quality of the picture totally dependent on the mega
pixels.

23. When light from an object fall on these pixels through the camera lens, they
become excited with an imprint on it.
This imprinted picture is passed through a color filter which create the analog
electric signals from light signals.
Then the analog signal is converted to digital signal with a analog to digital
signal converter.
Then these signals are saved in memory chips. And the combined signals
make the picture we want.

25. Samsung Flexible mobile
samsungs new flexible cell phone screen! - y outube.mpeg