13-06-2012, 05:19 PM
COMMUNICATION DESIGN OF MOBILE DISABLING AT RESTRICTED AREAS
Communication design of mobile disabling at restricted areas.pptx (Size: 325.8 KB / Downloads: 44)
Abstract
This method uses external circuits that are to be added into the Cell phones, which has many categories, where all the drawbacks are being put forth.
This project is considered as commercial and more practical.
The input jamming signal frequency is in the order of 400Mhz.
The deactivation of LCD panel and speaker is done through a micro controller 89c51.
This project gives total solution for both the customers and the network service providers.
Whereas in conventional jammers the user gets totally no signal message, in our project this problem is avoided so important calls are not missed.
Circuit diagram
When they get the signal from the receiver receives the signal and decode the signal and compare the predefined value and then it does the de activation of key board and speaker as long as the person is inside the coverage distance of the jammer.
Block diagram-Explanation
The basic functionality of our project could be divided into following two sections.
» Transmitter Section
» Receiver Section (in mobile device)
Transmitter section:
The transmitter section consist of 400mhz transmitter in omni direction.
RF Receiver
It also operates at 433.92MHz,and has a sensitivity of 3uV.
It operates from4.5 to 5.5 volts-DC,
It has both linear and digital outputs