Abstract:  Mobile jammer is used to prevent mobile phones from receiving or transmitting signal switch the base stations. It is effectively disable mobile phones within the defined regulated zones without causing any interference to other communication means, like television and radio broadcasting systems. It can be used in practically any location, but are used in places where a phone call would be particularly disruptive like Libraries, Hospitals, Cinema halls, schools & colleges, etc. As with other radio jamming, mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phones use I.e. for 900 MHZ and 1800 MHZ. This causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable. Upon activating mobile jammers, all mobile phones will indicate "NO NETWORK" in the necessary places. When the mobile jammers are turned off, all mobile phones will automatically re-establish communications and provide full service.
It was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosives. The signal isolator contains IF and RF section. IF section is used to generating tuning signal for feeding the RF section. The RF section is amplified the tuning signal and distribute the signal to surround air through antenna. The income (downlink) calling and jamming signal cancelled each other before interring to a phone.
In this project, its controlling this mobile jammer by means of PIC16F77 microcontroller IC. Language which is used embedded C language. compilation this program is in microC and finally our simulation is assembled through Proteus. The activation and deactivation time schedules can be programmed with microcontroller. Real time clock chip DS1307 is used to set the schedules and used triple output regulated AC to DC power supply.

Keywords: Mobile jammer, jam zone, no network, scheduled jammer etc.,

PDF | DOI: 10.17148/DOI: 10.17148.IJARCCE.2018.767

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