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CELLULAR DEVICE DETECTION IN RESTRICTED PREMISIS
INTRODUCTION The most powerful portable electronic gadget a person can control today is a cell phone or mobile phone. The demand for Mobile phones shown tremendous rapid growth in recent years drastically. The Mobile phone can transmit and receives the signal in the range of 0.9-3 GHz. Just a few electronic components are required for this project. Nothing expensive is used in this project. This project is ideal for school students and anyone can build this amazing small project in the lab. PRINCIPLE The basic principle of cell phone or mobile detector is to detect the RF signal frequencies. This circuit is designed in such a way that it rectifies low signal frequencies with very low noise of rate. When an inductor is placed near a RF signal frequency source it receives the signal through the principle of mutual induction. And the low power signals are amplified and transmit the power to any indicator which shows the response as we have used LED in our experiment. Using this small...
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