Electronic Lock

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ELECTRONICS LOCK

A Report of the project
for the fulfillment of the requirement of
NIRMAAN (Electronic Hardware Model Exhibition)
Sankalp-2009

Submitted By
PRAGNYASINI PANIGRAHI (EIE) 200860192 SIBANI SAIDARSANI (ECE) 200860316 ANKITA PANIGRAHI (EIE) 200810202

Organized By
Electronics Hobby Club, NIST

|[pic] |[pic] |

Under the guidance of:
Mr. R K Dash (Faculty Advisor)
&
Mr. M Suresh (Faculty Advisor)

NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY
PALUR HILLS, BERHAMPUR ORISSA- 761008 INDIA

ABSTRACT

An electronic key and lock system. The key unit is plugged in the unit and electrically interconnected therewith only through the leads. Each unit is fitted with a contact strip matrix provided with slots which allow access to the points of intersection of the contact strips from the external face of the unit, the user being provided with conductor pins that can be inserted in the slots so as to set up different combinations. Each unit contains electronic circuits designed to generate (in the case of both the key and the lock) and to detect (in the case of the lock only) a signal in which at least one parameter varies as a function of the established combination, the lock incorporating an electrical power supply for the electronic circuits of both units.

ACKNOWLEDGEMENT

My sincere thanks to Mr. M.Suresh (Faculty advisor ,EHC, NIST) for giving his valuable time and help during preparation of my preliminary seminar report.

I owe my special thanks to Mr. Rajesh Kumar Dash(Faculty advisor ,EHC, NIST), for giving me an opportunity to do this report.

And finally thanks to Prof. Sangram Mudali, NIST, Director and Dr. Ajit Kumar Panda , NIST , Dean for their continued drive for better quality in everything that happens at NIST. This report is a small contribution towards that greater goal.

PRAGNYASINI PANIGRAHY
ANKITA PANIGRAHI
SIBANI SAIDRSANI

TABLE OF CONTENTS

ABSTRACTi
ACKNOWLEDGEMENTii
TABLE OF CONTENTSiii
LIST OF FIGURESiv
1. INTRODUCTION1
2.APPARATUS REQUIRED………………………………………………………………………………………………………. 2. 3.CIRCUITDIAGRAM…………………..…………………………………………………………………………………………..3 4. THEORY………………………….…………………………………………………………………………………………….....5 4.APPLICATION..7

4. CONCLUSION9
5.REFERENCES10

INTRODUCTION
An electronic lock (more precisely an electric lock) is a locking system which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. More often electric locks are connected to an access control system. The advantages of an electric lock connected to an access control system include: key control, where keys can be added and removed without re-keying the lock cylinder; fine access control, where time and place are factors; and transaction logging, where activity is recorded. There are six (or more) push switches. To ‘unlock’ all the correct ones must be pressed at the same time, but any of the cancel switches must not be pressed. Pressing just one cancel switch will prevent the circuit unlocking. When the circuit unlocks it actually just turns on an LED for about one second, but it is intended to be adapted to turn on a relay which could be used to switch on another circuit. This circuit just turns on an LED for about one second when the correct switches are pressed. It does not actually lock or unlock anything. This project uses a 555 monostable circuit.

APPARATUS REQUIRED
1. resistors: 470, 100k ×2, 1M
2. capacitors: 0.1µF, 1µF 16V radial
3. red LED
4. 555 timer IC
5. 8-pin DIL socket for IC...
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