This document presents information about a mobile phone detector project created by group members Hirak Jyoti Paul, MD. Tahrim Haque, Raju Hossain, Sarowar Hossain, and Tahuid Islam. The mobile phone detector is a small, portable device that can detect activated mobile phones within 1.5 meters to prevent unauthorized phone use in places like exam halls. It uses a capacitor circuit to sense radio frequencies from phones, even in silent mode. The detector has applications in restricting phone use where prohibited and detecting unauthorized transmissions.

2. GROUP MEMBERS
•HIRAK JYOTI PAUL ID - 152-15-5521
•MD. TAHRIM HAQUE ID - 152-15-5961
•RAJU HOSSAIN ID - 152-15-5745
•SAROWAR HOSSAIN ID - 151-15-4692
•TAUHID ISLAM ID - 151-15-4875

3. PRESENTATION TOPIC
•MOBILE PHONE DETECTOR

4. WHAT IS MOBILE PHONE DETECTOR?
• OVERVIEW
• AS INCREASE IN THE TECHNOLOGY IN THE WORLD USING THE ELECTRONIC
EQUIPMENTS ARE BEING USED IN A WRONG WAY LIKE, IN THE EXAMINATION
HALLS AND CONFIDENTIAL ROOMS. TO AVOID THIS WE ARE INTRODUCING A
PROJECT CALLED CELLPHONE DETECTOR.

5. INTRODUCTION
This is a handy & pocket size mobile transmission detector or sniffer can
sense the presence of an activated mobile Cell phone from a distance of
one & half meters . So it can be used in examination hall to detect cell phones .
It also useful to detecting the use of cell phone for spying & unauthorized video
transmission . This circuit has the capacity to detect any kind of incoming call,
outgoing call, sms & video transmission even if the cell phone is silent mode .

6. PROBLEM STATEMENT
Previously there was no technology to detect the cell phone in the
exam hall & other restricted areas. There is a manual checking but
still have chance of having cell phones . So to avoid this problem an
automatic detection of cell phone is introduced .

7. EQUIPMENTS

9. CIRCUIT DIAGRAM

10. HOW THIS CIRCUIT WORKS
• ORDINARY LC (COIL-CAPACITOR) CIRCUITS ARE USED TO DETECT LOW
FREQUENCY RADIATION IN THE AM AND FM BANDS. THE TUNED TANK CIRCUIT
HAVING A COIL AND A VARIABLE CAPACITOR RETRIEVE THE SIGNAL FROM
THE CARRIER WAVE. BUT SUCH LC CIRCUITS CANNOT DETECT HIGH
FREQUENCY WAVES NEAR THE MICROWAVE REGION. HENCE IN THE CIRCUIT, A
CAPACITOR IS USED TO DETECT RF FROM MOBILE PHONE CONSIDERING THAT,
A CAPACITOR CAN STORE ENERGY EVEN FROM AN OUTSIDE SOURCE AND
OSCILLATE LIKE LC CIRCUIT.

11. APPLICATION
• IT CAN BE USED TO PREVENT USE OF MOBILE PHONES IN EXAMINATION
HALLS, CONFIDENTIAL ROOMS, ETC.
• IT IS ALSO USEFUL FOR DETECTING THE USE OF MOBILE PHONE FOR SPYING
AND UNAUTHORIZED VIDEO TRANSMISSION.
• IT IS USEFUL WHERE THE USE OF MOBILE PHONE IS PROHIBITED LIKE PETROL
PUMPS AND GAS STATIONS, HISTORICAL PLACES, RELIGIOUS PLACES AND
COURT OF LAWS.

12. CONCLUSION
• THIS POCKET-SIZE MOBILE TRANSMISSION DETECTOR OR SNIFFER CAN
SENSE THE PRESENCE OF AN ACTIVATED MOBILE CELL PHONE FROM A
DISTANCE OF ONE AND-A-HALF METERS. SO IT CAN BE USED TO PREVENT
USE OF MOBILE PHONES IN EXAMINATION HALLS, CONFIDENTIAL ROOMS,
ETC. IT IS ALSO USEFUL FOR DETECTING THE USE OF MOBILE PHONE FOR
SPYING AND UNAUTHORIZED VIDEO TRANSMISSION.

13. FUTURE SCOPE
• TRYING TO INCREASE THE DETECTING RANGE OF CELL PHONE DETECTOR TO
FEW MORE METERS FOR OBSERVING WIDE RANGE OF AREA.

14. SAMPLE OF MOBILE PHONE DETECTOR