[REPORT] Smart phone Android Operated Robot ,WIRELESS,BLUETOOTH

 

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Smart phone Android Operated Robot

The project aims in designing a Robot that can be operated using Android mobile
phone. The controlling of the Robot is done wirelessly through Android smart phone
using the Bluetooth feature present in it. Here in the project the Android smart phone is
used as a remote control for operating the Robot.
Android is a software stack for mobile devices that includes an operating system,
middleware and key applications. Android boasts a healthy array of connectivity options,
including Wi-Fi, Bluetooth, and wireless data over a cellular connection (for example,
GPRS, EDGE (Enhanced Data rates for GSM Evolution), and 3G). Android provides
access to a wide range of useful libraries and tools that can be used to build rich
applications. In addition, Android includes a full set of tools that have been built from the
ground up alongside the platform providing developers with high productivity and deep
insight into their applications.
Bluetooth is an open standard specification for a radio frequency (RF)-based,
short-range connectivity technology that promises to change the face of computing and
wireless communication. It is designed to be an inexpensive, wireless networking system
for all classes of portable devices, such as laptops, PDAs (personal digital assistants), and
mobile phones. It also will enable wireless connections for desktop computers, making
connections between monitors, printers, keyboards, and the CPU cable-free.
The controlling device of the whole system is a Microcontroller. Bluetooth
module, DC motors are interfaced to the Microcontroller. The data received by the
Bluetooth module from Android smart phone is fed as input to the controller. The
controller acts accordingly on the DC motors of the Robot. The robot in the project can
be made to move in all the four directions using the Android phone. The direction of the
robot is indicated using LED indicators of the Robot system. In achieving the task the
controller is loaded with a program written using Embedded ‘C’ language.

RF based electronics notice board,sms tranmission

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 RF based notice board

Introduction

Single or Multi electronic notice boards with operating distance up to 1000meters using RS485 protocol

Notice boards play a vital role mostly in educational institutions. The events, occasions or any news, which has to be passed to the students, will be written on the notice boards present in every floor in the colleges or schools. The present system is like, a person will be told the news and he has to update this news on all the notice boards present in the college or school. This will be seen mostly during the examination seasons.

The time table or the schedule of the exams has to be given to the students. This will be done by writing the details on the notice boards. But this process consumes a lot time to update the news on all the notice boards and there may be chances that the person responsible may commit some mistakes or he may be absent sometimes. So, this may create disturbances and the entire schedule may be disturbed. To avoid all these, electronic Notice Board have been designed which completely eliminates the manual work.
   Here we are using RS48.  It is an  alternative for RS-232 for long distance. RS-232 only up  to 15m. but in MAX 485 up to 1500m limit. in addition we connect up to 32 devices.                           If your control system needs to receiving and sending data in the same time you must use full duplex transmission mode. It is possible (and in real world this is the most popular case) that control system first sends request message to ROV (e.g. get temperature) and than waits for the response. In this scenario, there is no possibility that control system and ROV sends data in the same time, so half duplex communication is sufficient.  For full duplex communication you need 4 wires, for half duplex only 2 wires. MAX485 is providing half duplex mode. If you need to use full duplex you must use 2 units (or full duplex chip).

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13.   NOTICE BOARD USING RF MODULE:> REport
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