The document describes a 4-digit security keypad project created by students Ahmed TauseefAffan, Syed Abdullah Shah, and Yousuf Abdul Salam. The project aimed to familiarize the students with circuit elements like ICs, relays, and transistors. It also provided hands-on experience to help in future work as electronics engineers. The keypad was assembled on a breadboard and veroboard and used components like capacitors, resistors, CMOS chips, LEDs, and a buzzer. The working and applications of the security keypad are described, including potential uses to enhance security at facilities, banks, and other locations requiring private security. In conclusion, the students learned that projects improve practical

1. INTRODUCTION Group members :-Ahmed TauseefAffanSyed Abdullah ShahYousuf Abdul Salam

2. 4 DIGIT SECURITY KEYPAD

3. OUR AIMThe basic aim of our project was to familiarize ourselves with the circuit elements that we study in our course on practical basis.Secondly by completing this project we were looking forward to gain experience that will help us in our future works as electronics engineers.We also desired to get familiar with some new circiut elements such as IC, relay coil etc that will help us in our coming studies.

4. Elements used in our projectCapicitors 100 nFResistors 27k , 4.7k , 2.2kCmos 4081 & SktTransistors BC 547Relay SPDT/SPCO(270R coil resistance) LEDBuzzerYousuf in hard bargain.

5. Assembling of the circuitWe made a demo of the circuit on the breadboardBut assembled the final circuit on the veroboardBecause of its wide range of applications.Also by using the veroboard we looked forward toGet ourselves familiarized with the working of the Veroboard.

6. CIRCUIT DIAGRAM

7. WORKING OF THE PROJECT

8. APPLICATIONS There are a lot of practical applications of a security kepad some of which are described below :-It can be used to enhance the security of our research facilities by installing the device at the doors of important areas.Likewise banks can use the device for their security purposes.Almost everything that demands a private security can take advantage of the security keypad.

9. CONCLUSIONFinally we conclude that working on a project may be a tiresome job but it enhances our practical skills as well as polishes our concepts on practical basis.It also helps us in realizing our innovative abilities.

10. THIS IS WHERE WE STARTED THANK YOUFor further information regarding our project please visit our website www.projectaja.webs.com AT THE ENTRANCE OF COLLEGE ROAD