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Design and construction of a remote controlled tri–band frequency jammer.
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- Contributor: mr-chris
- engagements: 183
- Case No: 583742pw
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT COMING SOON
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APPENDIX A - [ Total Page(s): 1 ]APPENDIX AList of Components• Vero Board • Connecting wire • Power Switch • 30 Amps Fuse • Soldering Lead • Soldering Iron • LEDs • 240V/ 60V Transformer • 12 volts D.C battery • • IN9004, IN4004.1 diode, • 750 Ω, 750.1Ω, 100Ω, 1KΩ, 2KΩ, 22KΩ, 100KΩ, 1KΩ, 2KΩ, 22kΩ resistors • 555 timer • 12μF, 103μF, 104.2μF, 104.4μF, 104.5μF, 134.2μF, 220μF, 1000μF, 12nF Capacit ... Continue Reading
APPENDIX B - [ Total Page(s): 2 ] ... Continue Reading
CHAPTER ONE - [ Total Page(s): 2 ]CHAPTER ONEINTRODUCTION1.1 BACKGROUND OF THE STUDYA mobile phone jammer or signal blocker is an instrument used to prevent cellular phones from receiving signals from base stations. The process of blocking the receiver to receive a transmitted signal is called Jamming of the signal. The jammer effectively disallows cellular phone signal when activated. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected. Such places include court rooms, meeting venues, lecture theatres or ... Continue Reading
CHAPTER TWO - [ Total Page(s): 3 ]CHAPTER TWOLITERATURE REVIEW AND THEORETICAL FRAMEWORK2.1 INTRODUCTIONWireless networking plays an important role in achieving ubiquitous computing where network devices embedded in environments provide continuous connectivity and services, thus improving human’s quality of life. However, due to the exposed nature of wireless links, current wireless networks can be easily attacked by jamming technology. Jamming can cause Denial-of- Service (DoS) problem which may result in several other higher-layer security problems, although these are often not adequately addressed (Wood et al, ... Continue Reading
CHAPTER THREE - [ Total Page(s): 11 ]The operation of power supply is as shown:The transformer which transforms 220V AC to other levels of voltages. Its functions are outlined below:i. Rectification: Convert the AC voltage to DC voltage.ii. Filtering: “Eliminate the noise†so that a constant DC voltage is produced. This filter is just alarge capacitor used to minimize the ripple in the output.iii. Voltage Regulation: It provides the desired DC voltage.The step down transformer steps down the input voltage from 220V AC to 12 V AC. This is then converted to a DC voltage by the diode bridge rectifier. R ... Continue Reading
CHAPTER FOUR - [ Total Page(s): 5 ]The bar chart in figure 4.9 above shows the jamming strength of the jammer at Eigbejila, Odota and Garin Alimi area of Ilorin west Local government area kwara State, Nigeria. It is obvious from table 4.2 above that as the distance between the cell phone and the base station increases, the effective jamming distance increases. This is due to the fact that the amount of power reaching the cell phone from the base station decreases as the cell phone moves farther from the base station and vice versa, as radio wave frequency (EM wave) tends to zero as it moves away from the source that produces ... Continue Reading
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVECONCLUSION, CHALLENGES, RECOMMENDATION 5.1 ConclusionsThis project is very useful for mobile phones restricted places such as private meetings, examination hall, defense establishments, military camp, Hospitals; Petrol pumps, Libraries etc. This device can scramble/jam mobile devices in a given area within the operating frequency range of 800MHz - 2100MHz at the range of 2-7 meters. The designed device works in Tri-band. It jams the GSM 800 band, GSM 1800 band and the additional UTMS 2100 band. The device was able to jam the four main cell phone carriers in Nigeria: MTN ... Continue Reading
REFRENCES - [ Total Page(s): 1 ]REFERENCES1. Science Journal of Physics ISSN: 2276-6367 http://www.sjpub.org/sjp.html.2. Radio Jamming", Wikipedia Foundation, Inc. 2012. 3. "Electronic Warfare", Wikipedia Foundation, Inc. 2012. 4. "Electronic Counter-Countermeasures", Wikipedia Foundation, Inc. 2012. 5. Scourias, John (1997): Overview of the Global System for Mobile Communications, University of Waterloo.6. "Mobile Phone Jammers", Wikipedia Foundation, Inc. 2012.7. Semiconductor device and circuit, 3rd edition, McGraw-Hills Company, Singapore. http//www. Mobile and personal communica ... Continue Reading
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ABSRACT - [ Total Page(s): 1 ]ABSTRACT COMING SOON
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