Bluetooth Wireless Communication method for Intelligent Traffic Light System

• We choose Arduino Bluetooth Module Slave Wireless Serial Port 4P for our wireless communication purposes (http://www.ebay.com/itm/Arduino-Bluetooth-Module-Slave-Wireless-Serial-Port-4P-/150653185968?pt=LH_DefaultDomain_0&hash=item2313a12fb0).

  
  
  
  
  
  To use this device in the mood working 100% correct, we have to use a resistor divider to reduce the operating  Because PIC18f452's RX,TX operating in 5V-0V range but in this Bluetooth reviver it operates in 3.3V to 0V range. So we put up a voltage divider between the Arduino Bluetooth Module Slave Wireless Serial Port and the PIC's RX, TX pins. After setup according to the below diagram Bluetooth Module will start working. When you search for new Bluetooth it will appear as a other type of device.You can couple the device with your laptop using its embedded pin code. After that your PC will have a serial port open via Bluetooth. you can easily communicate with that.

  
  
  

The Circuit Make Me Crazy......

People Said that i can do a PHD about that circuit.That has only 4Capacitors,1 IC, 1 serial port

I maid it nearly 50 times.

That circuit is USART circuit with max 232.

If you guys want to do robotics with communication with PC that is the circuit.

But that makes all thing a mess.

If you guys want to do it follow these tips.

1. Do not use a PC which leaks AC currents to the body.
2. Use a proper communication cable.
3. Make this circuit in separate PCB.
4. If you guys have communication problem, please check the IC.

If you guys still have trouble contact me.

MYJE - Navigational System for Exmo 2010 and Innovation CSE 2010

This project is a navigational system for Sri Lanka, which provides you the paths to unknown destination and guide you through the path. Also it had a robot car demonstration, which shows the functionality of the project. This Project has won the second place at the Innovation CSE 2010 organized by CSE University Of Moratuwa. 

Read these articles which will explain you about it's implementation level details.

http://www.insightforfuture.blogspot.com/2010/10/robotics-line-sensors.html
http://www.insightforfuture.blogspot.com/2010/10/avoiding-oscillation-in-line-following.html
http://www.insightforfuture.blogspot.com/2010/10/circuit-make-me-crazy.html

Here are some pictures of my project....