ARM BASED 4-BIT CODED LOCKER

PROJECT GUIDE :M.RAVI

BY: B.V.S. ALEKHYA (10521A04A1) SHUBHAM KUMAR (10521A0487)ROHIT SOURABH (10521A0484) V.BHANU CHAITANYA(10521A04A4)D.V.Y.V. SUBBA RAO (11525A0403)

ARM BASED 4-BIT CODED LOCKER WITH ELECTRIC SHIELD

INTRODUCTIONBLOCK DIAGRAMSECTIONSLOCKING SECTIONCONTROLLING SECTIONNECESSITY TO USE ARMCIRCUIT DIAGRAMCOMPONENTS REQUIREDWORKINGADVANTAGES INVOLVED IN THE PROJECTIMPROVEMENTS THAT CAN BE MADE

CONTENTS

Disadvantage of conventional mechanical lockers- high cost and comparatively lower security

It is an electronic code lock based on NXP LPC2148 microcontroller

Alphanumeric password is needed to open the locker

If password is wrong a buzzer blows to alert security within reach

The burglar may be subjected to shock if he tries to touch the locker

INTRODUCTION

BLOCK DIAGRAM

LOCKING SECTION

TECHNOLOGY USED:

We used actuating technology for the locking section

We used motor with a nut and bolt and designed an actuator

This actuator will be used for auto closing and opening of locker

SECTIONS

LOCKING SECTION

CONTROLLING SECTION

LOCKER

we connected a nut and bolt to a geared motor and designed the locker unit

DPDT SWITCH

we used a dpdt toggle switch for opening and closing of the locker

ELECTRIC SHIELD

we placed the conductor around the walls of locker

this conductor is allowed free flow of electric supply and it is indicated by red color led circuit

LPC2148 is based on 32 bit ARM7TDMI(-S) developed by ARM Holdings

3-stage pipeline Keeps its instructions and data in the same memory system High speed on-chip flash memory of 512 KB Embedded ICE hardware, give on-chip breakpoint and

watchpoint support

High performance and very low power consumption

Two instruction sets: 1. Standard 32-bit ARM instruction set. 2. 16-bit THUMB instruction set. On-chip static RAM (SRAM) Enhanced Multiplier, 64-bit result

CONTROLLING SECTION

Why ARM?

LOW COST LOW POWER REQUIREMENTS LOW POWER DISSIPATION MULTIPLE FUNCTIONALITIES BETTER RAM AND ROM

CAPABILITIES RISC-BASED PROCESSOR INDUSTRIAL REQUIREMENTS

CIRCUIT DIAGRAM

Blueboard equipped with NXP LPC2148 microcontrollerQWERTY keyboardRelayElectronic lockerSpeakers

COMPONENTS REQUIRED

NGX Blue Board

KEYBOARD CONNECTIVITY WITH THE BLUEBOARD

WORKING OF THE WHOLE SYSTEM

When the user enters a password using the Keyboard attached to the Blueboard, then the logic built in the Embedded C program checks it with the pre-stored password. 1. If both the passwords match, then the LCD displays the “ Correct Password” message and after 2 seconds instructs the user to toggle up/down the Red Switch connected to the relay by displaying a message “Toggle Red Switch”. 2. If the password entered by the user is wrong, then the LCD will display the message as “Password Wrong, Try Again” by alarming with a buzzer attached to the Blueboard and gives the user 2 more chances of entering the correct password. If the user still fails to type the correct password in their 3rd attempt,then the LCD displays the message as “Security Alarm” and the microcontroller will send a Security alarm signal by generating an audio signal for 15 seconds which will be played on the speaker.

DISPLAY ON ENTERING CORRECT PASSWORD

DISPLAY ON ENTERING WRONG PASSWORD MORE THAN THRICE

ADVANTAGES INVOLVED IN THE PROJECT• Highly Secure due to the presence of multilevel security with electric shield• The development board requires just 3.3 V of power supply and hence power consumption and dissipation are very low.• Security alarm with the help of DAC is possible, thus alerting the security personnel if any unauthorized repeated access is made more than thrice.• Inability for any unauthorized user to access the locker due to the presence of all-time electric shock.• One-minute blocking of the whole system if any unauthorized access is made more than thrice.• Made on a low budget of Rs. 4200 which is quite low as compared to the similar type of system available in the market

IMPROVEMENTS THAT CAN BE MADE

• GSM-GPS INTERFACE CAN BE INCORPORATED• A BETTER USER INTERFACE CAN BE PROVIDED

THROUGH HYPER-TERMINAL USING RS-232 COMMUNICATION AT THE COST OF INCREASED BUDGET

• A PERIODIC ALARM CAN BE CONFIGURED FOR MORE ENHANCED SECURITY USING THE RTC MODULE PRESENT IN THE BLUEBOARD

THANK YOU