1. Atmega based garrage door openning
Project Title
Atmega based garrage door openning
Under the Guidance of
Submitted by

2. ABSTARCT
The main objective of this project is to provide a security system having the provision to change the password by the authority only.
Remote operation is achieved by any smart-phone/Tablet etc., with Android OS, upon a GUI (Graphical User Interface) based touch screen operation.
Android application is used to enter the password and a relay to lock or unlock the electric door, which is indicated by a lamp.

3. PROJECT BLOCK DIAGRAM

4. HARDWARE COMPONENTS Arduino Duemalinove ,Relay Driver IC, EEPROM.
Bluetooth device.
Resistors, Capacitors, LED, Diodes.
Relays Transformer, Voltage Regulator.
Crystal, Lamps.

5. POWER SUPPLY Bridge rectifier 5v Regulator 230 V AC 50 Hz 5V DC
Filter(470µf)
12V step down
transformer

6. ARDUINO
The Arduino microcontroller is an easy to use yet powerful single board computer that has gained considerable traction in the hobby and professional market.
The Arduino is open-source, which means hardware is reasonably priced and development software is free.

7. Image of development board

8. Features of Duemalinove
The Duemalinove board features an Atmel ATmega328 microcontroller operating at 5 V with 2 Kb of RAM, 32 Kb of flash memory for storing programs and 1 Kb of EEPROM for storing parameters.
The clock speed is 16 MHz, which translates to about executing about 300,000 lines of C source code per second

9. …..contd
The Arduino programming language is a simplified version of C/C++. If you know C, programming the Arduino will be familiar.
If you do not know C, no need to worry as only a few commands are needed to perform useful functions.

10. What is called Android..?
Android is an open-source operating system which means that any manufacturer can use it in their phones free of charge.
It was built to be truly open. For example, an application can call upon any of the phone’s core functionality such as making calls, sending text messages, or using the camera. 

11. …….contd
Android is built on the open Linux Kernel. Furthermore, it utilizes a custom virtual machine that was designed to optimize memory and hardware resources in a mobile environment.

12. What is an android application on mobile phones?
An android app is meant for phones with an android based operating systems. They can be downloaded from the android app Market which is pre-loaded on every android phone.
Blue control APP and Bluetooth Spp APP are some examples.

13. Android-The world's most powerful mobile platform
Very customizable. Open source operating system is easily changed, hacked, manipulated, and molded to fit whatever functionality you had in mind. Found on all platforms for all prices depending on what hardware and software version you are interested in. The battery is usually replaceable.

14. COMPARISION OF ANDROID WITH OTHER OS
ANDROID OS : Android is open source software, manufacturers can modify the operating system to suit their respective needs and phones. This becomes a cheap and feasible alternative for the manufacturer, as opposed to developing an operating system in-house or hiring a software company to do it.

15. i-OS:
It's not available on all carriers but this is expanding. The battery is not replaceable which is why all the I Phone users you know have it plugged in all the time as the battery degrades.

16. Windows Phone:
Windows Phone is a closed-sourced, which means that it is solely developed by the company and protected by copyright. The Windows Store is limited as there only a few number of apps

18. ANDROID APP-Bluetooth SPP
Bluetooth SPP Manager is an app, which provides communication between two Bluetooth devices.
it uses the RFCOMM Protocol also known as Serial Port Protocol (SPP) to transmit data between devices.

19. Device pairing- APP Asking for a secured Pin use “1234” pin

20. HIGHLIGHTS OF SPP APP Communication between Bluetooth devices via SPP.
Using This App, communication between a phone and external processor/controller can be achieved.
Serial communication is an asset of this app.
Text,chat,digits..etc can be transmitted to any external Devices.

21. APP ASKING FOR OPERATION MODES ALWAYS USE FOR REAL TIME MODE OPTION

22. Easily available Resource
CAN BE FREELY DOWNLOADABLE FROM GOOGLE PLAY FROM ANY ANDROID PHONE AND CAN EASILY INSTALL IT .
From Any Android Phone an Internet Access/wi-fi..or any other resource is Necessary to Down load the APP.

23. ANDROID APPLICATION OPERATED BLUETOOTH
The Android platform includes support for the Bluetooth network stack, which allows a device to wirelessly exchange data with other Bluetooth devices.
The application framework provides access to the Bluetooth functionality through the Android Bluetooth APIs.

24. FEATURES OF BLUETOOTH
Super simple and easy way to interface using Bluetooth stack.
3.3V Device with standard 5V DC Power source.
Can also support SPI Protocol, pins are made available.
Low power consumption, Low cost.
Has high-performance wireless transceiver system
Can be used to interface with PC, Mac or Android phones/tablets.

25. Generic Default Visibility at Software side:HC-06 or Linvor
Default Pairing code is not '0000' but '1234'.
Please use Baud Rate with 8-N-1 connectivity from other device.
Works with any microcontroller with Serial connectivity.

26. RELAY IT IS A ELECTRO MAGNETIC SWITCH
USED TO CONTROL THE ELECTRICAL DEVICES
COPPER CORE MAGNETIC FLUX PLAYS MAIN ROLE HERE

27. The relay's switch connections are usually labeled COM, NC and NO:
COM = Common, always connect to this; it is the moving part of the itch.
NC = Normally Closed, COM is connected to this when the relay coil is off.
NO = Normally Open, COM is connected to this when the relay coil is on

28. RELAY DRIVER (ULN 2003)
ULN2003 is a high voltage and high current Darlington transistor array
It consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode Clamp diode for switching inductive loads.
The ULN2003 has a 2.7kW series base resistor for each Darlington pair for operation directly with TTL or 5V CMOS devices.
Current, Output Max:500mA
Voltage, Input Max:5V
Voltage, Output Max:50V

29. Fig: ULN 2003

30. BC547 The BC547 transistor is an NPN Epitaxial Silicon Transistor.
The BC547 transistor is a general-purpose transistor in small plastic packages.
It is used in general-purpose switching and amplification BC847/BC547 series 45 V, 100 mA NPN general-purpose transistors.
Whenever base is high, then current starts flowing through base and emitter and after that only current will pass from collector to emitter

31. Working of Project
Please refer cd.

32. Software requirements
Arduino software which can be freely available on Arduino Forum

33. THANK YOU