Mobile Detector using PSOC (mini_project)

7/30/2019 Mobile Detector using PSOC (mini_project)

1/22

A Report on

DESIGN AND IMPLEMENTATION OF MOBILE

DETECTOR IN EXAMINATION HALL USING PSOC

M.Tech (Electronics Design & Technology)

Submitted by

P.VENKATA RAO (M120155EC)

Department of Electronics and Communication Engineering

NATIONAL INSTITUTE OF TECHNOLOGY CALICUT

Kozhikode, Kerala- 673 601.

Monsoon 2012.


2/22

Mobile detector

NIT Calicut Page 1

ACKNOWLEDGEMENT

We want to thank faculties of the College. They have been very kind and helpful to

us. We also want to thank all teaching and Nonteaching staff to support us. Especially we are

thankful to Smt. Lyla B Das for providing this golden opportunity to work on this project, inspiration

during the course of this project and to complete the project within stipulated time duration.

We would like to express our sincere gratitude to our guide Mr.Jmshir for their help during

the course of the project right from selection of the project, their constant encouragement, expert

academic and practical guidance


3/22

Mobile detector

NIT Calicut Page 2

INDEX

CHAPTER-1 ......................................................................................................................................... 3

1.1 Introduction ................................................................................................................................... 3

CHAPTER-2 ......................................................................................................................................... 4

2.1 Block Diagram ............................................................................................................................. 4

2.2 Components Used in Cell Phone Detector................................................................................... 4

CHAPTER-3 ......................................................................................................................................... 5

3.1 Current to voltage converter circuit ............................................................................................. 5

3.2 Working Principle ......................................................................................................................... 5

3.3 Antenna ......................................................................................................................................... 6

3.4 CA3130 ......................................................................................................................................... 6

3.5 features of Ca3130 ........................................................................................................................ 7

3.6 applications of Ca3130 ................................................................................................................. 7

3.7 pin diagram of Ca3130.................................................................................................................. 8

CHAPTER-4 ......................................................................................................................................... 9

4.1 Introduction ................................................................................................................................... 9

4.1.1 PSoC Designer Flow ........................................................................................................ 9

4.2 features and overview of PGA block ............................................................................................ 9

4.3 Features and Overview of ADC block ........................................................................................ 10

CHAPTER-5............................................................................................................................. 12

5.1 LED: ........................................................................................................................................ 12

5.2 Piezo Buzzer: .......................................................................................................................... 13

CHAPTER-6............................................................................................................................. 14

6.1 ALGORITHM: ......................................................................................................................... 14

6.2 Flow Chart: ................................................................................................................................ 14

CHAPTER-7............................................................................................................................. 16

7.1 Applications of cell Phone Detectors .......................................................................................... 16

CHAPTER-8 ....................................................................................................................................... 18

8.1 Conclusion ................................................................................................................................. 18

8.2 References .................................................................................................................................. 18


4/22

Mobile detector

NIT Calicut Page 3

ABSTRACT

As using of mobile phones in the colleges premises and in the examination halls are

restricted. It sometimes it is not possible to detect the mobile phones with the students this

project will solve that problem by automatically detecting the mobile phone and gives the

alarm sound automatically.

This project Design and implementation of Mobile detector in examination Hall

using PSOC used colleges for detecting the mobile phones and gives the buzzer sound

simultaneously that information will be displayed on LCD.


5/22

Mobile detector

NIT Calicut Page 4

CHAPTER-1

1.1 INTRODUCTION:

This handy cell phone detector, pocket-size mobile transmission detector can sense

the presence of an activated mobile cell phone from a short distance. So it can be used to

prevent use of mobile phones in examination halls, confidential rooms, etc. It is also useful

for detecting the use of mobile phone for spying and unauthorized video transmission. The

circuit can detect the incoming and outgoing calls, SMS and video transmission even if the

mobile phone is kept in the silent mode. It senses the radio frequency (RF) transmissions

from nearby cellular or mobile phones. If required, other sources of RF transmissions can

also be detected including two-way radios, and other wireless communication devices. When

a transmission is detected, an alarm sequence begins that may include any combination of

visual LED glows. In addition the unit can be used as a static or portable detector, and it can

be used to generate remote alarms, activate other equipment (including remote indication

devices) and extend alarm messages into other areas. Cellular phone technology is rapidly

changing. Features like Bluetooth, USB, high resolution cameras, microphones, Internet,

802.11 wirelesses, and memory cards are added every year. Also, the communication

technology a cellular phone uses such as CDMA, GSM, 3G, and 4G are rapidly changing.

Hence there is more chance for leaking of confidential matter. In order to avoid such leakage

of information cell phone detectors are used.


6/22

Mobile detector

NIT Calicut Page 5

CHAPTER-2

2.1 BLOCK DIAGRAM:

Fig 2.1: Block Diagram

2.2COMPONENTS USED IN CELL PHONE DETECTOR: ANTENNA IC CA3130 RESISTORS CAPACITORS PSOC KIT LED PIEZO BUZZER 12V SUPPLY


7/22

Mobile detector

NIT Calicut Page 6

CHAPTER-3

3.1 Current to voltage converter circuit:

Figure: circuit diagram of current to voltage converter.

3.2 Working Principle:

An ordinary RF detector using tuned LC circuits is not suitable for detecting signals in the

GHz frequency band used in mobile phones. The transmission frequency of mobile phones

ranges from 0.9 to 3 GHz with a wavelength of 3.3 to 10 cm. So a circuit detecting gigahertz

signals is required for a mobile bug. Here the circuit uses a 0.22F disk capacitor (C3) to

capture the RF signals from the mobile phone. The lead length of the capacitor is fixed as 18

mm with a spacing of 8 mm between the leads to get the desired frequency. The disk

capacitor along with the leads acts as a small gigahertz loop antenna to collect the RF signals

from the mobile phone.

Op-amp IC CA3130 (IC1) is used in the circuit as a current-to-voltage converter with

capacitor C3 connected between its inverting and non-inverting inputs. It is a CMOS version

using gate-protected p-channel MOSFET transistors in the input to provide very high input

impedance, very low input current and very high speed of performance. Capacitor C3 in

conjunction with the lead inductance acts as a transmission line that intercepts the signals

from the mobile phone. This capacitor creates a field, stores energy and transfers the stored


8/22

Mobile detector

NIT Calicut Page 7

energy in the form of minute current to the inputs of IC1. This will upset the balanced input

of IC1 and convert the current into the corresponding output voltage. Capacitor C4 along

with high-value resistor R1 keeps the non-inverting input stable for easy swing of the output

to high state. Resistor R2 provides the discharge path for capacitor C4. Feedback resistor R3

makes the inverting input high when the output becomes high. Capacitor C5 (47pF) is

connected across strobe (pin 8) and null inputs (pin 1) of IC1 for phase compensation and

gain control to optimize the frequency response. When the mobile phone signal is detected by

C3, the output of IC1 becomes high and low alternately according to the frequency of the

signal as indicated by LED1.

3.3 ANTENNA:

The size and shape of the antenna and the way it's constructed determine the gain and

directivity of the antenna. The antenna transmits and receives electromagnetic signals. When

gain increases the amount of desired signal energy that can be captured Increase but the

amount of environmental noise and interferences that's captured increases by the same

amount.

Antenna receives the radio frequency signals (RF signals) from the mobile phone. The

radio frequency signals are grasped by the antenna. In the detection process we use a wire

type antenna. An antenna (or aerial) is an electrical device which converts electric currents

into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver.

In transmission, a radio transmitter applies an oscillating radio frequency electric current to

the antenna's terminals, and the antenna radiates the energy from the current as

electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power

of an electromagnetic wave in order to produce a tiny voltage at its terminals that is applied

to a receiver to be amplified. An antenna can be used for both transmitting and receiving.

3.4 CA3130:

CA3130A and CA3130 are op amps that combine the advantage of both CMOS and

bipolar transistors. Gate-protected P-Channel MOSFET (PMOS) transistors are used in the

input circuit to provide very-high-input impedance, very-low-input current and exceptional

speed performance. The use of PMOS transistors in the input stage results in common-mode

input-voltage capability down to 0.5V below the negative-supply terminal, an important

attribute in single-supply applications.


9/22

Mobile detector

NIT Calicut Page 8

A CMOS transistor-pair, capable of swinging the output voltage to within 10mV of

either supply-voltage terminal (at very high values of load impedance), is employed as the

output circuit. The CA3130 Series circuits operate at supply voltages ranging from 5V to

16V, (2.5V to 8V). They can be phase compensated with a single external capacitor, and

have terminals for adjustment of offset voltage for applications requiring offset-null

capability. Terminal provisions are also made to permit strob of the output stage.

3.5 FEATURES OF CA3130:

a. Very High Impedance= 1.5 T (1.5 x 1012)b. Very Low Current= 5pA at 15V Operation

i. = 2pA at 5V Operationc. Ideal for Single Supply Applications.d. Common-Mode Input-Voltage Range Includes negative Supply Rail.e. Input Terminals can be Swing 0.5V Below Negative Supply Rail.f. CMOS Output Stage Permits Signal Swing to Either (or both) Supply Rails.

3.6 APPLICATIONS OF CA3130:

Ground-Referenced Single Supply Amplifiers

Fast Sample-Hold Amplifiers Long-Duration Timers/ Mono stable multi vibrators.

High-Input-Impedance Comparators (Ideal Interface with Digital CMOS)

High-Input-Impedance Wideband Amplifiers

Voltage Followers (e.g. Follower for Single-Supply D/A Converter)

Voltage Regulators (Permits Control of Output Voltage Down to 0V)

Peak Detectors

Single-Supply Full-Wave Precision Rectifiers

Photo-Diode Sensor Amplifiers


10/22

Mobile detector

NIT Calicut Page 9

3.7 PIN DIAGRAM OF CA3130:

Fig 1.1: Pin diagram of CA3130.


11/22

Mobile detector

NIT Calicut Page 10

CHAPTER-4

PSOC

4.1 Introduction:

PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you

can use to customize PSoC to meet your specific application requirements. PSoC Designer

software accelerates system bring-up and time-to-market. Develop your applications using

a library of pre-characterized analog and digital peripherals in a drag-and-drop design

environment. Then, customize your design leveraging the dynamically generated API

libraries of code. Finally, debug and test your designs with the integrated debug

environment including in-circuit emulation and standard software debug features.

4.1.1 PSoC Designer Flow:

Following are the steps in the PSoC Designer flow:

Step 1: Create a project

Step 2: Choose a base device to work with.

Step 3: Choose and configure user modules that give the PSoC device the functionality you

need.

Step 4: Connect the user modules to each other, as appropriate, and to the proper pins.

Step 5: Write firmware for your project in C or assembly language.

Step 6: Program the PSoC device and test the program

4.2 Features and Overview of PGA BLOCK:

CY8C26/25xxx: thirty-one user-programmable gain settings with a maximum gain of16.0.

All other PSoC Devices: thirty-three user-programmable gain settings with amaximum gain of 48.0.

High impedance input Single-ended output with selectable reference

The PGA User Module implements an op-amp based non-inverting amplifier with user-

programmable gain. This amplifier has high input impedance, wide bandwidth, and selectable

reference..


12/22

Mobile detector

NIT Calicut Page 11

4.3 Features and Overview of ADC BLOCK:

6 to 14-bit resolution Optional synchronous 8-bit PWM output Optional differential Input Signed or unsigned data format Sample rate up to 15.6 ksps (6-bit resolution) Input range defined by internal and external reference options Internal or external clock

The ADCINC is a differential or single input ADC that returns a 6 to 14 bit result. The

maximum Data Clock frequency is 8 MHz, but 2 MHz is the maximum frequency

recommended for improved linearity. This ADC may only be placed one time, due to its

implementation which uses the hardware decimator rather than a digital block. This is the

most resource efficient ADC. A 2nd order modulator may be implemented with an additional

switch-capacitor block, allowing better linearity with an 8 MHz Data Clock. Timing is

implemented with an eight bit PWM that gives you a modulated pulse width that is

synchronous to the input sample.

The ADCINC requires 2n1 integration cycles to generate an output with n bits of resolution.


13/22

Mobile detector

NIT Calicut Page 12


14/22

Mobile detector

NIT Calicut Page 13

CHAPTER-5

5.1 LED:

LED means Light Emitting Diode. It is an electronic device that lights up when

electricity is passed through it. LEDs are usually red. They are good for displaying imagesbecause they can be relatively small. The moment the bug detects RF transmission signal

from an activated mobile phone, it starts sounding a beep alarm and the LED blinks. LEDs

contain an integrated multi vibrator circuit inside which causes the LED to flash with a

typical time period.

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. 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 colour of the light (corresponding to the energy of the photon) is

determined by the energy gap of the semiconductor. LEDs are 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 robustness, smaller size, and faster switching. LEDs

powerful enough for room lighting are relatively expensive and require more precise currentand heat management than compact fluorescent lamp sources of comparable output.

Fig 5.1: Light Emitting Diodes


15/22


16/22

Mobile detector

NIT Calicut Page 15

CHAPTER-6

IMPLEMENTATION

6.1 ALGORITHM:

i. Supply is given to activate the circuit.ii. A transaction is made through the mobile.

iii. The antenna receives the IR signals and passes them to op-amp.iv. LED glows indicating that IR signals are sensed.v. The output of op-amp is fed to the PSOC.

vi. The PSOC activates the buzzer.vii. The buzzer indicates that the cell phone is detected.6.2 FLOW CHART:

Fig 6.1: Flow chart


17/22

Mobile detector

NIT Calicut Page 16

Figure 6.2 : Implementation of mobile detector


18/22

Mobile detector

NIT Calicut Page 17

CHAPTER-7

APPLICATIONS OFCELL PHONE DETECTORS

1 .MILITARY BASIS:

In government buildings and military bases the unit should be installed in all sensitive

areas. In addition to potential RAT phones, the Cell phone Detector can detect bugs emitting

RF within the specified band range. In addition, it can be rigged to trigger a digital camera to

capture an image of a person using a phone in a restricted area by sending a signal to an

external trigger mechanism from the remote alarm terminal.

2. PRISONS:

Cell phone Detector may be placed outside cell doors during lock uphours within

prison wings to reduce illicit cellular phone activity. In addition, Cell phone Detector maybe

installed in entranceways, corridors, waiting and meeting areas where inmatesvisits are

conducted.

3 .HOSPITALS:

Cell phone Detector units are installed in general locations in corridors and waiting

rooms to deter nuisance public cellular phone usage. Sensitive electronic equipment within

intensive care wards and operating theatres that are vulnerable to RF interference will haveunits installed near them.

4 .SCHOOLS AND COLLEGES:

Cell phone Detector units are installed in general locations in corridors, assembly

points, concourses, classrooms and lecture theatres to promote conformity and establishment

order. Cell phone detector units are deployed in examination rooms to deter examination

fraud via text messaging.

5 .PLACES OF WORSHIP:

Cell phone Detector units are installed as a deterrent at the main entrance. Where

cellular phone misuse is a severe or persistent problem then units can be installed in the main

prayer area with audio alert set to low volume.

6. MUSEUMS AND LIBRARIES:

Cell phone Detector units are installed in all areas in museums and libraries with

audio warning on low volume.


19/22

Mobile detector

NIT Calicut Page 18

7 .COURTROOMS:

Cell phone Detector units are installed directly outside courtrooms with range set to

near. Inside the courtroom itself, a wall-mounted unit silently flashing in the public gallery

may alert security staff.

8. GENERAL APPLICATION:

Cellular phone detection and deterrence is an additional layer of security for your

organization. How effective this layer of security will be will be dependent on the

environment, the number of devices installed and how the detectors are integrated with other

layers of security such as metal detection and access control systems. Confidential advice and

assistance regarding how this product can be used is available from your supplier.


20/22

Mobile detector

NIT Calicut Page 19

CHAPTER-8

8.1 CONCLUSION

Cellular phone technology is gaining new data capabilities very rapidly. New features

like Bluetooth, high resolution cameras, memory cards, and Internet make them ideal for

getting data in and out of secure facilities. A cellular phone uses many different transmission

protocols such as FDMA or CDMA. These protocols dictate how a cellular phone

communicates with the tower. Typically cellular phones in the United States operate between

824 - 894 MHz Many businesses depend on keeping information protected and build

fortresses that called secure facilities to protect their investment. Currently the only way to

ensure that no one is bringing a cellular phone into a secure facility is to search everyone

entering and exiting. This requires a lot of manpower and money to implement.

This project is used for military and civil defense for mobile radiation detection. Used

for spying the unauthorized video transmission in mobile phones. Used to prevent the usage

of mobile phones in examination halls. The signals emitted by mobile phones can interfere

with some electronic equipment inside the hospital. This could have fatal consequences. so

we use this project to detect the usage of mobile phones in the above places.

8.2 REFERENCES

1. www.cypress.com/psocexampleprojects.2. www.alldatasheets.com3. www.efyprojects.com4. www.circuitstudy.com
http://www.cypress.com/psocexampleprojectshttp://www.cypress.com/psocexampleprojects


21/22

Mobile detector

NIT Calicut Page 20

CODE

//------------------------------------------------------------

----------------// MOBILE DETECTOR

//------------------------------------------------------------

----------------

#include // part specific constants and macros

#include"PSoCAPI.h" // PSoC API definitions for all User

Modules

int h,i;

void main(void)

{

PGA_Start(PGA_MEDPOWER);

LCD_Start();

M8C_EnableGInt; // Enable Global Interrupts

ADCINC_Start(ADCINC_HIGHPOWER); // Apply power to the SC Block

ADCINC_GetSamples(0); // Have ADC run continuously

i=5;

for(;;)

{

while(ADCINC_fIsDataAvailable() == 0); // Loop until

value ready

ADCINC_iClearFlagGetData();

h=ADCINC_bGetData();

LCD_Position(0,0);

LCD_PrCString("MOBILE DETECTOR ");

if(h>200)


22/22

Mobile detector

NIT Calicut Page 21

{

i=i+100;

LCD_Position(1,0);

LCD_PrCString("detected ");

PRT1DR=0X03;

if(i>=30000)

{

i=15000;

}

}

else

{

i=i-5;

if(i==0)

{

LCD_Position(1,0);

LCD_PrCString("no mobile");

PRT1DR=0X00;

i=15000;

}

}

}

}

Documents

Mobile Detector using PSOC (mini_project)