ALIVE HUMAN DETECTOR ROBOT WITH

COMPUTER USING WIRELESS COMMUNICATION

ABSTRACT

AIM:

The main objective of this project is to develop an embedded system, which is a

wireless water level indicator by using RF

IMPLEMENTATION:

This project is implemented 8051 based At89s52 developed board interfaced with

RF Tx, RF Rx, Encoder, Decoder, PIR sensor.

BLOCK DIAGRAM:

CRYSTAL

RPS

MICROCONTROLLER

AT89S52

PC

RF Rx

Max 232 DECODER

POWER SUPPLY:

Step DownTransformer

BridgeRectifier

FilterCircuit Regulator

section

CRYSTAL

RPS

MICROCONTROLLER

AT89S52RF Tx

PIRSensor

ENCODER

DESCRIPTION:

A robot can talk, walk, run and do anything as per logic embedded in it even though the

robot can do the above things. It seems a useless thing if it is uncontrollable. Here

controlling a robot is main task has to consider while designing any robot. Here, an PIR

sensor is used to detect human body radiation.

In this project there are two embedded systems based microcontroller boards.

Among which one is transmitter connected with PIR sensor and placed on a robot

platform and the receiver board is connected to our PC through MAX 232. When ever the

PIR sensor senses the human body radiation the sensor in turn signals the microcontroller

and the controller sends to the encoder and this signal is transmitted to the receiver board

through RF Tx. When the RF Rx receiver receives the code it decodes in the decoder and

given it to the controller and via MAX 232 it will be displayed on the PC.

The system uses a compact circuitry built around Flash version of AT89S52

microcontroller with a non-volatile memory capable of retaining the password data for

over ten years. The user can modify the password. Programs are developed in embedded

C. ISP is used to dump the code into the microcontroller

SOFTWARE:

Embedded ‘C’

RIDE to write code

ISP to burn the chip

HARDWARE:

At89s52 based our own developed board

Power Supply

RF Tx

RF Rx

Encoder

Decoder

ADVANTAGES: Low cost, automated operation, Low Power consumption.

REFERENCES

1. The 8051 micro controller and embedded systems by Mazidi.

2. www.wikipedia.org

3. WWW.atmel.com

4. www.8051projects.com

5. Embedded systems with 8051 by kenith j ayala