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Smart phone controlled traffic signal override with density sensing system Under the Guidance of

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Project TitleABSTARCTThe project is designed to develop a density based dynamic traffic signal system having remote override facilities with android intelligence. In the event of emergency, vehicles like ambulance, fire brigade etc requiring priority are built in with Android application deviceThis android based Bluetooth operated intelligence overrides the set timing by providing instantaneous green signal in the desired direction while blocking the other lanes by red signal.PROJECT BLOCK DIAGRAM

HARDWARE COMPONENTS8051 series Microcontroller. LEDs, Voltage Regulator, Resistors. Capacitors, Crystal, Diodes. Transformer, IR-LED & Photodiodes. Transistor, Bluetooth device.

POWER SUPPLY

230 V AC 50 Hz5V DC 12V step down transformerFilter(470f)5v Regulator

Bridge rectifier

MICROCONTROLLER It is a smaller computerHas on-chip RAM, ROM, I/O ports...

RAM ROMI/O PortTimerSerial COM PortMicrocontrollerCPUA single chipINTERNAL STRUCTURE OF A MICRO CONTROLLER-AT89S52/51CPUOn-chip RAMOn-chip ROM for program code4 I/O PortsTimer 0Serial PortOSCInterrupt ControlExternal interruptsTimer 1Timer/CounterBus ControlTxD RxDP0 P1 P2 P3Address/DataCounter InputsFeatures of AT89S51/52Compatible with MCS-51 Products8K Bytes of In-System Programmable (ISP) Flash MemoryEndurance: 10,000 Write/Erase Cycles 4.0V to 5.5V Operating Range Fully Static Operation: 0 Hz to 33 MHz256 x 8-bit Internal RAM 32 Programmable I/O Lines Three 16-bit Timer/Counters Eight Interrupt Sources Full Duplex UART Serial Channel Interrupt Recovery from Power-down Mode Watchdog Timer Dual Data Pointer

Pin Description

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 phones core functionality such as making calls, sending text messages, or using the camera..contdAndroid 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.What is anandroidapplication onmobilephones?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.

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.

13COMPARISION OF ANDROID WITH OTHER OSANDROID 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.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.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

ANDROID APPLICATION OPERATED BLUETOOTHThe 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. An example of Android App Blue-control Screen

FEATURES OF BLUETOOTH

Super simple and easy way to interface usingBluetoothstack.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 systemCan be used to interface with PC, Mac or Android phones/tablets.

Generic Default Visibility at Software side:HC-06 or LinvorDefault 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.

IR LEDAn IR LED, also known as IR transmitter, is a special purpose LED that transmits infrared rays in the range of 760 nm wavelength.Such LEDs are usually made of gallium arsenide or aluminum gallium arsenide. They, along with IR receivers, are commonly used as sensors.The appearance is same as a common LED. Since the human eye cannot see the infrared radiations, it is not possible for a person to identify whether the IR LED is working or not, unlike a common LED. To overcome this problem, the camera on a cell phone can be used. The camera can show us the IR rays being emanated from the IR LED in a circuit.

PHOTO DIODE

A photodiode is a type of photo detector capable of converting light into either current or voltage, depending upon the mode of operation.Photodiodes are similar to regular semiconductor diodes except that they may be either exposed (to detect vacuum UV or X-rays) or packaged with a window or optical fibred connection to allow light to reach the sensitive part of the device.

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

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Schematic Diagram(PLEASE REFER CD)Working of ProjectThe project uses the IR interruption concept for generating logic states to the input of the MC. To achieve the same a number of IR diodes are used facings photodiodes. While the IR light falls on the photodiode the resistance of the photodiode falls increasing the bias voltageLogic high sensed by the MC input changes the green ON time to a higher value for allowing more vehicles to pass through. After sometime in case any other way gets more logic high, the sequential timing gets automatically increased for that way. Based on the IR interruption the green ON time increases, thus more the vehicle longer will be the green signal time. Thus dynamic time control is achieved based on the traffic density.

Soft ware RequirementsKeil an ARM Company makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for ARM7/ARM9/Cortex-M3, XC16x/C16x/ST10, 251, and 8051 MCU families.

Compilers are programs used to convert a High Level Language to object code. Desktop compilers produce an output object code for the underlying microprocessor, but not for other microprocessors. i.e the programs written in one of the HLL like Cwill compile the code to run on the system for a particular processor like x86 (underlying microprocessor in the computer).

For example compilers for Dos platform is different from the Compilers for Unix platformSo if one wants to define a compiler then compiler is a program that translates source code into object code.

ApplicationsAdvantagesConclusionFuture scopeTHANK YOU