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Cell phone can be detected anywhere within the range of 100 feet

Transcript of project report on cellphone tracer

Mobile Scanner A mini project report Submitted by

i. Nikhil Hangeii. Ketan Mahajaniii. Narendra Belhekar Submitted in partial fulfillment of term work for the subject ELECTRONIC HARDWARE AND WORKSHOPUnder the guidanceMr. Umesh Mahadik


We hereby declare that the work entitled Mobile Scanner is a record of our own work carried out by us during the academic year 2012 2013 under the supervision and guidance of Mrs. Pragati Ukey, Professor, Department of Electronics and Telecommunication, MGMs College of Engineering and Technology. The extent and source of information are derived from the existing literature and have been indicated through the dissertation at the appropriate places. The matter embodied in this work is original and has not been submitted for the award of any other degree or diploma, either in this or any other University.

Place :

Date :

(Signature of the Candidate)


This is to certify that the project entitled Temperature Controlled Fan is a bonafide work carried out by Mr. Ketan Mahajan , Mr. Nikhil Hange and Mr.Narendra Belhekar from the department of Electronics and Telecommunication (TE) have satisfactorily completed the project report entitled Mobile Scanner in partial fulfillment of the term work for the subject Electronic Hardware and Workshop in MGMs College of Engineering and Technology, Kamothe during the academic year 2012-2013. ---------------------------- -----------------------

Signature of the Guide Signature of HOD

Place: MGMs College of Engineering and Technology, Kamothe.


It adds to our pleasure to acknowledge the people who have helped me while the project was in progress.

First of allwe are thankful to Ms. Pragati, our Project Guide, who helped us in bringing out this project in present status.

I am grateful to our Head of the Department, PROF. Ms. BHOSALE MAM, for providing us the facility of excellent lab instruments and relevant accessories.

We are also grateful to our Hon. Principal , whose discipline has created regularity in us, so as to complete the project within given time.


Here is a device to locate the mobile phone. It emits intermittent flashes and beeps to indicate the presence of an active mobile phone. The circuit becomes active even if the mobile phone is in silent mode. It can be used to detect mobile phone call in noisy environments. Range of the circuit is 15 cm


1. IC 4017

2. Tank circuit

3. Rx Antenna

Contents: Page1. Introduction 82. Circuit details . 9i. Circuit diagram................ 9ii. List of components. 10iii. Simulation 16iv. Implementation.. 173. Advantages ... 184. Applications . 195. Result ... 206. Conclusion ... 217. Future scope.. 22

8. References ...... 239. List of Figures

a. Circuit Diagram of Mobile Scanner 9Introduction:

.The circuit is basically an RF detector. During the activation of mobile phone, strong RF field will be generated. The sensor coil L detects the RF signals and T1 amplifies the signals. The amplified signals are given to the clock input of IC1. CD 4017 is a Johnson decade counter IC with 10 outputs. Its clock input pin 14 is highly sensitive to RF pulses so that it is a very good choice for RF detection. Only two outputs (Q1 andQ2) of the IC are used while the Q3output is tied to the reset pin 15 so that IC will reset on every third pulse.Circuit details

Circuit Diagram:

Fig. a Mobile Scanner Circuit DiagramList of components

R2-2.7K 1/4W Resistor R1-120K 1/4W Resistors L-10mH Inductor C-0.1F 63V Polyester Capacitor T1-BC549 NPN Transistor D1-LED 5v 5v Piezo-buzzer CD4017-Johnson Decade Counter

9v Battery


Component description:INDUCTOR: An inductor (also choke, coil or reactor) is a passive two-terminal electrical component that stores energy in its magnetic field. For comparison, a capacitor stores energy in an electric field, and a resistor does not store energy but rather dissipates energy as heat.

Any conductor has inductance. An inductor is typically made of a wire or other conductor wound into a coil, to increase the magnetic field.

When the current flowing through an inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, according to Faraday's law of electromagnetic induction, which by Lenz's law opposes the change in current that created it. Inductors are one of the basic components used in electronics where current and voltage change with time, due to the ability of inductors to delay and reshape alternating currents


Acapacitor(originally known ascondenser) is apassivetwo-terminalelectrical componentused to storeenergyin anelectric field. The forms of practical capacitors vary widely, but all contain at least twoelectrical conductorsseparated by adielectric(insulator); for example, one common construction consists of metal foils separated by a thin layer of insulating film. Capacitors are widely used as parts ofelectrical circuitsin many common electrical devices.

When there is apotential difference(voltage) across the conductors, a staticelectric fielddevelops across the dielectric, causing positive charge to collect on one plate and negative charge on the other plate.Energyis stored in the electrostatic field. An ideal capacitor is characterized by a single constant value,capacitance, measured infarads. This is the ratio of theelectric chargeon each conductor to the potential difference between them.


Resistors are the most commonly used component in electronics and their purpose is to create specified values of current and voltage in a circuit. A number of different resistors are shown in the photos. (The resistors are on millimeter paper, with 1cm spacing togive some idea ofthe dimensions). PhotoResistors with power dissipation below 5 watt (most commonly used types) are cylindrical in shape, with a wire protruding from each end for connecting to a circuit.Resistors with power dissipation above 5 watt are shown below LED: A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Appearing as practical electronic components in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.

When a light-emitting diode is forward-biased (switched on), electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. An LED is often small in area (less than 1 mm2), and integrated optical components may be used to shape its radiation pattern. LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. LEDs powerful enough for room lighting are relatively expensive and require more precise current and heat management than compact fluorescent lamp sources of comparable output.

Light-emitting diodes are used in applications as diverse as aviation lighting, automotive lighting, advertising, general lighting, and traffic signals. LEDs have allowed new text, video displays, and sensors to be developed, while their high switching rates are also useful in advanced communications technology. Infrared LEDs are also used in the remote control units of many commercial products including televisions, DVD players, and other domestic appliances.Transistor: A transistor is a semiconductor device us