DIGITAL CODE PASSWORD OPERATED INDUSTRIAL

MACHINERY CONTROL

ABSTRACT

AIM:

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

used to control the machinery in industries through digital password.

IMPLEMENTATION:

This project is implemented 8051 based At89s52 developed board interfaced with

relay, keypad, Control Unit and LCD for displaying the data.

BLOCK DIAGRAM:

Keypad

MICROCONTROLLER

AT89S52

RPS

CRYSTAL

RELAY

ControlUnit

LCD

POWER SUPPLY:

DESCRIPTION:

Security is a prime concern in Industries. Every machinery in industry has to be

much secure as possible. An access control forms a vital link in a security chain. The

microcontroller based password operated machinery control allows only authorized

persons to control the machines. The system is fully controlled by the 8 bit 8051 based

microcontroller.

The system comprises of a small electronic unit with a numeric keypad which is

fixed at the control panel through which password is entered. When an authorized person

enters, a predetermined number (password) is entered via the keypad, microcontroller

compares the predefined passwords and if the password matches then the user can

operate the machinery through relay. Relay is an electronic switch which is used to

ON/OFF the machine. And if the entered password is wrong relay will be off and

displays same on the LCD

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. Programs are developed in embedded c using ride compiler. Isp is used to

dump the code into the microcontroller

Step DownTransformer

BridgeRectifier

FilterCircuit Regulator

section

SOFTWARE:

Embedded ‘C’

RIDE to write code

ISP to burn the chip

HARDWARE:

At89s52 based our own developed board

Power Supply

Keypad

Relay

Control Unit

LCD

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