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WWW.PPTSEMINARS.COMWWW.PPTSEMINARS.COM

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 INTRODUCTION  INTRODUCTION 

TINY MOBILE TINY MOBILE 

CIRCUIT EXPLANATION CIRCUIT EXPLANATION 

WORKING WORKING 

 APPLICATIONS  APPLICATIONS 

 ADVANTAGES  ADVANTAGES 

CONCLUSION CONCLUSION 

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 Mobile computing has changed the very definition of   Mobile computing has changed the very definition of  

communication by the phenomenally improvised communication by the phenomenally improvised 

technology technology 

 As communication is mobilized every where,the mobile  As communication is mobilized every where,the mobile revolution has ruled almost every field making the future revolution has ruled almost every field making the future 

merely predictable and even possible.merely predictable and even possible.

The software implements low The software implements low--power techniques  power techniques  , , whichwhich

extend battery life to more extend battery life to more than a year than a year of continued use,of continued use,using AA cells.using AA cells.

This mobile requires a circuit with some added features This mobile requires a circuit with some added features 

and is yet to be designed as our future aim would be aand is yet to be designed as our future aim would be a

 MULTI  MULTI--PURPOSE INTELLIGENT MOBILE. PURPOSE INTELLIGENT MOBILE.

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Tiny planet

Switchmotor

on

staticrelay

Output

Motor

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.. During setup, the four messages used as commands and theDuring setup, the four messages used as commands and the

two messages used as responses aretwo messages used as responses are stored in the phonestored in the phone

memory memory  , where they can be read back by the controller  , where they can be read back by the controller 

issuing the appropriate extended issuing the appropriate extended--AT command. AT command.

F or every command message, the set F or every command message, the set--up routine extracts aup routine extracts a

unique 6unique 6--byte "signature" from the last message bytes and byte "signature" from the last message bytes and stores it instores it in EEPROM EEPROM ..

#7: FOR NEW INCOMING

MESSAGES

#6: SET OUTPUT

#5: CLEAR OUTPUT

#4: PULSE OUTPUT

#3: REQUEST INPUT STATUS

#2: MESSAGE WHEN

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 AN EXAMPLE: AN EXAMPLE:

consider the control of AC in our homes.consider the control of AC in our homes.

 An SMS is sent by the master mobile which is interpreted  An SMS is sent by the master mobile which is interpreted by the circuit and passed on to the Slave mobile as aby the circuit and passed on to the Slave mobile as a

command which then controls the operation of AC. This command which then controls the operation of AC. This 

message is first accepted as high input by RS232 interface message is first accepted as high input by RS232 interface 

connected to the mobile, which is then regulated by the connected to the mobile, which is then regulated by the Zener diode.Zener diode.

This is passed through the transistor at the collector,This is passed through the transistor at the collector,

which acts as a switch and sends it to the slave mobile.which acts as a switch and sends it to the slave mobile.

The software implements The software implements low low--power techniques, power techniques, whichwhich

extend battery life toextend battery life to more than a year more than a year of continued use of continued use 

using AA cells.using AA cells.

 

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The TINY12 is perfectly suited to run on batteries.

 Most of the time the controller is in sleep mode  , with only the watchdog on.

 In this condition, power consumption is only  200  µA.

Control is resumed when the watchdog expires (a couple of   seconds), or when the input pin changes. When running the 

required current is about 1 mA, for a period as short as 20 

msec.

 Every 10 short breaks (about 20 sec) the micro controller 

 starts a longer dialogue with the mobile, requiring an extra

840 mS at 1,2 mA.

 

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 F irst switch on the mobile and then connect it to the  F irst switch on the mobile and then connect it to the 

main system designed using a suitable data cable. This is main system designed using a suitable data cable. This is 

the ´slave phoneµ, to differentiate it from the ´masterµ the ´slave phoneµ, to differentiate it from the ´masterµ 

 phone used to issue commands  phone used to issue commands ..

FIRST, BEGIN FROM THE SLAVE MOBILE:FIRST, BEGIN FROM THE SLAVE MOBILE:

 Delete all the messages currently in memory. Delete all the messages currently in memory.

Send to master the message for the input low condition,Send to master the message for the input low condition,e.g e.g .. "THE INPUT IS LOW" "THE INPUT IS LOW" 

Send to master the message for the input high condition,Send to master the message for the input high condition,

e.g e.g .. "THE INPUT IS HIGH"."THE INPUT IS HIGH".

 

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 MASTER  MASTER MOBILE USED TO ISSUE COMMANDS MOBILE USED TO ISSUE COMMANDS::

Send to slave the message for requesting the input status e.g.Send to slave the message for requesting the input status e.g.

"WHAT IS THE INPUT STATUS?" "WHAT IS THE INPUT STATUS?"  Send to slave the message for pulsing the output e.g. "PULSE Send to slave the message for pulsing the output e.g. "PULSE 

OUTPUT".OUTPUT".

Send to slave the message for clearing the output e.g. "SWITCH Send to slave the message for clearing the output e.g. "SWITCH 

OUTPUT O  FF ".OUTPUT O  FF ".

Send to slave the message for setting the output e.g. "SWITCH Send to slave the message for setting the output e.g. "SWITCH 

OUTPUT ON´ OUTPUT ON´ 

When all the seven messages are received, press the When all the seven messages are received, press the CON  F  IGURATION button on the TINY. The LED flashes CON  F  IGURATION button on the TINY. The LED flashes 

until setup is complete. When the system is running, the LED until setup is complete. When the system is running, the LED 

 flashes once every 20  flashes once every 20--25 seconds. 25 seconds.

 

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Tiny Mobile is simple, flexible, portable solution useful Tiny Mobile is simple, flexible, portable solution useful 

 for wide range of applications. for wide range of applications.

 It is a very optimized design. It is a very optimized design.

The code is denser, including power management and The code is denser, including power management and 

adaptive baud generator in just 417 out of 512 words adaptive baud generator in just 417 out of 512 words 

available.available. The user interface developed is remarkable.The user interface developed is remarkable.

 

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Used to make an extended range remote control Used to make an extended range remote control 

operations from anywhere in the world.operations from anywhere in the world.

 It can monitor the working conditions of the industry. It can monitor the working conditions of the industry.

Commercially, a home automation system can be Commercially, a home automation system can be conveniently controlled and monitored from the cell conveniently controlled and monitored from the cell 

 phone. phone.

To enhance even further its wide applicability, the To enhance even further its wide applicability, the circuit is very small, battery operated.circuit is very small, battery operated.

 

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 Mobile computing has a bright future ahead. Hence  Mobile computing has a bright future ahead. Hence 

mobility opens up new venues for interesting and unique mobility opens up new venues for interesting and unique 

 products and services are possible only in a mobile  products and services are possible only in a mobile environment.environment.

 It will also finds applications in areas of defense and  It will also finds applications in areas of defense and 

aerospace.aerospace.

To design a dream mobile, which serves an intelligent To design a dream mobile, which serves an intelligent multi multi--purpose should be our aim, that looks harder to purpose should be our aim, that looks harder todesign but not attainable.design but not attainable.

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