Electronics letter box

In this project, we will show you a simple Electronic Letter Box, a circuit that can be used to indicate whenever receive a mail (physical mail – like a letter). An LED is used as an indication in this Electronic Letter Box Project.

1. ELECTRONICS LETTER BOX Course no.: EEE-366 Course title: Digital Electronics Sessional GROUP MEMBERS Shantanu Bhattacharjee [ID: 1602002] Habibur Rahman [ID: 1602004] Nayem Al Kayed [ID: 1602008] 1

2. CONTENTS Objectives Introduction Literature review Methodology Work done Result Analysis Conclusion Future works 2

3. Objectives Objectives of this system are : To notify user about urgent letters To preserve the condition of the letters To modify the existing letter box 3

4. Introduction In this project, we will show a simple Electronic Letter Box, a circuit that can be used to indicate when ever receive a mail (physical mail – like a letter). An LED is used as an indication in this Electronic Letter Box Project. 4

5. Literature Review ‘’Smart Letter Box System Using Obstacle Sensor For Notifying t he User By Android Application’’ Prof. Anjali Devi Pujari,Priyank International Research Journal of Engineering and Technology (IRJET ). 5

6. Methodology 6

7. Components LM741 – 1 CD4001 – 1 Resistors 10KΩ – 5 1KΩ – 2 Capacitors 0.1μF – 2 C1,C2(.1uF) – 2 LEDs – 2 LDR 5V Power Supply Mini Breadboard Connecting Wires 7

8. Schemati c 8

9. Work Done 9

10. Result Analysis 10 Case 01 : Until someone puts a letter in the box LED remains off. Case 02: If someone puts a letter in the box LED will be turned on.

11. Future Works 1.Making a real time monitoring and remote connected system using GSM. 2.Can be use at government postal offices &Post boxes. 3. Use in bank for cheque drop box also 11

12. Conclusion The progress in science & technology is a non-stop process. New things and new technology are being invented. As the technology grows day by day, we can imagine about the feature in which thing we may occupy every place. We concluded that principle of science should be- ‘’Nothing is impossible’’ Such that we look to a growth of science in bright world. 12

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