Mobile phone detector:-

Mobile phone detectors are devices that can detect active mobile phones around them by using antenna based detection system. As stated earlier when mobile phones are active there exist a radio frequency signal transmitted and received by the trans receiver and the mobile, thus mobile phones detector detect are designed to detect this kind of signal by their antenna and use it as an input then give us an output weather by a speaker alarm buzzer or any output device. They are mostly used for security purposes. During a test time or any place where using mobile phones are forbidden they can be used to detect any kind of cheating. In-plane stations they also can be used to test whether the devices in the hand of the customer are mobile phone are not, for the sake of security.

The Intelligent mobile phone detection project is an advanced device that finds various applications in the modern fields of communication and surveillances. This work is very helpful for the special meetings, examination room, security establishments, army camp, Hospitals; Petrol pumps, etc. where the management of an actual Mobile Communication (GSM) device is prevented.

Use of mobile Phone Detector:-

It is also useful for detecting the use of mobile phones for watching and illegal video transmission. Certain places where the use of mobile phones are not allowed like an exam room, temples, offices, and theaters, in those places to identify and restrict the use of mobile phones this advanced system is very helpful. This must detect the incoming and outgoing calls, SMS and video transmission even if the mobile phone is kept in the silent mode. The prohibited use of cell phones is a growing and dangerous problem in correctional institutions worldwide. These devices are a significant threat to prison security and circumvent the monitoring processes in prisons while helping inmates commit new crimes both inside and outside the facility.

How Mobile Phone Detector Works:-

The moment the bug detects RF transmission signal from an activated mobile phone, it starts sounding a beep alarm and the LED blinks. The alarm continues until the signal transmission ceases. An ordinary RF indicator using attuned LC circuits is not suitable for detecting signals in the GHz frequency band used in mobile phones.

Advantages of Cell Phone Detector:-

•  Smaller in size
•  Detection of hidden cell phones

Need for Mobile phone detector:-
Although the scope of this type, of course, is very wide, the final customers for this design will be a master when a test time to expose lying using cell phones. Nowadays there is no related device in use that can solve this kind of problem. At present, the only way to determine whether students are using explosive electronics is by visual examination. The project has the following specifications based on customer needs:

Maximum detection range:-

the circuit is developed to detect signals with maximum distance from it compared with the one that has been developed since.

 Distance indicator:-

This is the most interesting part of our project. The circuit can show whether you are far or close to the source of the signal using its 4 LEDs installed with a 4 bit counter circuit.

 Portability:-

the final device to be created in this project is easy to be handled and moved all the teachers’ walkthrough to cover all over the hall.

 Easily maintainable:-

the PCB that has been designed for this device has 4 parts that enable it to be easily fixable in case of emergency and maintenance problems.

Secret identification:-

to ensure the safety of the environment and other peaceful students who are taking the exam the indication system is using 4 LEDs. This gives the teacher to find out where the source of the signal is without being considered.