This document proposes a project to design an advanced signal disrupting device with an LCD display. The device aims to block transmission signals by creating interference with undedicated signal frequencies. It will function as both a radio frequency jammer and GSM jammer, blocking commercial FM radio bands and GSM signals. The system design will include power supply, intermediate frequency, radio frequency, and antenna blocks to disrupt signals. It will use a microcontroller and LCD display to indicate jamming of signals using radio waves. The project aims to block mobile phone signals within a range of 850MHz to 2170MHz frequencies for security applications.

1. SCHOOL OFADVANCED TECHNOLOGY, ENGINEERING AND SCIENCE (SATES)
ENGINEERING PROJECT PROPOSAL FOR SUMMER ACADEMIC YEAR
COURSE:
ELECTRICAL/ELECTRONICS ENGINEERING
PROJECT TITLE:
DESIGN OF AN ADVANCED SIGNAL DISRUPTING DEVICE WITH LCD DISPLAY
STUDENT(S)
IKEH CHIBUZO FRANCIS
(INDEX NO.: ENG13B00245Y)
&
ALOZIE ANTHONY .C
(INDEX NO.: ENG13B00218Y)
SEPTEMBER, 2015

2.  Introduction
 The Study Objectives
 System design and implementation
 Concluding remarks

3. Having so much signals flying around exclusive environment like the airplanes, class rooms, presidential
lodges, examination rooms, etc. has contributed to some of the mishaps that occurred in time past. These
signals may have been used to trigger bombs and cause interferences to aviation equipment etc.
In this proposal, the focus is on introducing an advanced signal disrupting device which blocks transmission
signals by creating interferences to undedicated signal frequencies. This wireless signal jammer can be
categorized into the Radio Frequency (RF) jammer and GSM jammer.
A Radio Frequency jammer is a device used to disrupt or prevent communication, it is an RF and GSM
frequency disrupter commonly known as wideband radio frequency (RF) and GSM cell phone jammer.
Simultaneously, they can block all commercial FM broadcast band (87.5 MHz to 108 MHz) and GSM signal
transmissions within the jammer's transmission range. The device can possibly block these frequencies by
transmitting a dirty signal (like noise) on the same frequency at which the GSM and radio system operates.
This proposed system would have successfully done a good job when the radio sets frequencies in a
geographical area are disabled.

4.  General objective
The main objective of study is to design and construct an advanced signal disrupting device with
LCD display for security application.
 Specific objectives
The specific objectives of this project are:
 To integrate an LCD display into the circuit
 To construct a wireless signal jammer for security application’s circuit.
 To block amplitude modulated and frequency modulated signal transmission by creating interference
within its range.
 To design Radio Frequency (RF), Intermediate Frequency (IF) and Power Supply circuit.
 To integrate an antenna into the system for IF/RF signal transmission.
 Construction, System testing, analysis and implementation of the entire system.

5. The block diagram of a signal disruptor consists of 4 main
blocks. These are
 Power supply
 IF section
 RF section
 Antennas
Figure 1: A simple block diagram

6. RF FOR FREQUENCY
RECIEVER
Microcontroller
(MCU)
Liquid Crystal Display (LCD)
Signal
Interference Noise
GSM
(935-960MHZ)
RADIO RECIEVER
(88-108MHZ)
POWER SUPPLY
(5V, 12V)
Local oscillator
for radio
receiver
Intermediate
frequency (IF)
Local
oscillator for
GSM
RF FOR GSM
SYSTEM DESIGN AND IMPLEMENTATION
Figure 2:System block diagram

7. Figure 3:Pictorial representation

8. Figure 4: Flow Chart
TOOLS
•Arduino IDE.
•Proteus professional

9.  The importance of this project cannot be over
emphasized as is application ranges from security to
health and safety, examination monitoring, GPS
tracking, etc.
 In this project, with the help of Arduino and AT mega
328 microcontroller we can indicate Jamming of the
Signals, with the help of Radio Waves. Hence, by
designing this project GSM CDMA, 3G mobile phone
signals are blocked within the given time schedule i.e. a
range of 850MHz to 2170MHz frequencies are blocked.