ABSTRACT:
The main goal of the project is to detect the nearness sense the presence of an activated mobile phone from a distance of one-and-a-half meters to prevent the use of same in the examination halls.
Certain places where the use of cell phones are not permitted like the exam hall, temple, offices, and theaters, in those places to recognize and limit the utilization of cell phones this proposed framework is exceptionally useful. This framework can identify any dynamic mobile phone i.e. at the point when some is endeavoring to make a call or receive a call, communicating something sending a message or receiving a message. In the previously mentioned conditions, a signal will sound, within the sight of a functioning wireless in the range of one and a half meters.
In this project, an RF finder utilizing tuned LC circuits is framed for detecting signals in the GHz frequency band utilized as a part of cell phones as the transmission frequency of cell phone ranges from 0.9 to 3 GHz.
A capacitor is utilized to shape a piece of the LC circuit as C while the lead of similar structures the L to get RF signals from the cell phone. At the point when the cell phone is activated the RF transmission signal is detected by the detector and begins sounding a beep alarm and the LED blinks.
