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Mobile Detector: Text & Image by Aditya Ramane

The document describes a mobile detector circuit and a mobile jammer circuit. The mobile detector circuit uses diodes and an LM386 amplifier IC to detect mobile phone frequencies between 500MHz to 1GHz by causing an LED to glow. It works by using diodes to detect frequencies which are then amplified by the IC. The mobile jammer circuit uses an RF amplifier, tuned oscillator, and noise producing capacitors to generate interference in the same frequency ranges used by mobile phones in order to disrupt mobile communication signals over a range of a few meters. Changing component values like the inductor and capacitor can increase the range of frequencies jammed.

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anupnaskar naskar
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149 views4 pages

Mobile Detector: Text & Image by Aditya Ramane

The document describes a mobile detector circuit and a mobile jammer circuit. The mobile detector circuit uses diodes and an LM386 amplifier IC to detect mobile phone frequencies between 500MHz to 1GHz by causing an LED to glow. It works by using diodes to detect frequencies which are then amplified by the IC. The mobile jammer circuit uses an RF amplifier, tuned oscillator, and noise producing capacitors to generate interference in the same frequency ranges used by mobile phones in order to disrupt mobile communication signals over a range of a few meters. Changing component values like the inductor and capacitor can increase the range of frequencies jammed.

Uploaded by

anupnaskar naskar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 4

MOBILE DETECTOR

INTRODUCTION

 This mobile detector circuit detects the mobile phones at low distances.
The frequencies which are emitted by mobile phones are detected by this
circuit.

 This circuit detects mobile frequencies up to 800Mhz to 900Mhz but in the


simulation, the circuit detects frequencies 500mHz to 1khz; this is because
in order to show the output to the viewers in simple & proper way.

WORKING PRINCIPLE

 In this circuit main components are IC LM386 and Diodes.

 We have used 2 diodes IN34 series. These two diodes are connected
alternate to each other. They act as a Schottky Diode. So when the
frequencies between Kilo Hz or Mega Hz comes in range of these diodes
the LED will glow.

 To simulate the circuit and to get output I used function generator and
connect across diodes, which produces frequency and the LED will glow.

 We will check circuit from 1kHz to 500mHz frequency. The range of this
circuit is in few meters.

Text & Image by


Aditya Ramane
CONSTRUCTION

 The diodes we used are 1n34 series diodes which are used to detect
the frequencies. These are the main components in the circuit as they
detect the mobile frequencies.

 These diodes connected alternatively so that these diodes act as a


Schottky diode Because Schottky Diode provides the forward path
to the signal to reach towards the IC.

 LM386 is the amplifier IC.

 We have used capacitor because it gives high gain. If you remove


capacitor from circuit you will still get output.

 But when you connect capacitor LED glows brightly because of


capacitor you are able to drive on output indicators like LED or
Buzzer.

 If you use 22uF capacitor LED will glow more brightly when circuit
will detect mobile phone frequencies.

 Increase or decrease in capacitance will not affect the output it will


just increase output gain so that indicators work more effectively.

Text & Image by


Aditya Ramane
MOBILE JAMMER
INTRODUCTION

 A Mobile Jammer is a device which used to fail or disturb any


communication system.

 Mobile Jammer produces a noise frequency range similar to the


communication frequency range which tend to add the noise to the
communication frequency.

WORKING PRINCIPLE

 What is Mobile Jammer?

 Usually your mobile phone communication works on some range of


frequencies. When in these frequencies same range of frequency noise
is get added then mobile communication fails or get disturbed.

 When we add such range of frequencies in mobile communication using


any circuit then that circuit is called Mobile Jammer.

 Assume if some applications are working on 445MHz frequency range


and you add same range of frequency noise then those applications will
not work correctly.

CONSTRUCTION

 The Mobile Jammer circuit is mainly made up of three circuits:

 RF Amplifier
o RF Amplifier is made up of capacitors, transistor and resistor and
which is used to amplify the signal and noise signal produced by
capacitors.

 Tuned oscillator
o Tuned oscillator produces high frequency with less damping.

 Noise producing capacitors


o Noise producing capacitors produces the noise signal which will get
add in communication frequency range.
Text & Image by
Aditya Ramane
How to increase range of mobile/frequency jammer?

 To increase the range of frequency, you should change the values of 22nH
inductor and 15pF capacitor. As you reduce the values of these two
components range of frequency will increase.

 To find how much range of frequency your circuit will produce use above
formula....
1/(2 x pi x square root of (L x C))

 If you choose capacitor of 1pF and inductor less than 22nH then the circuit
will produce 1GHz frequency means circuit will able to jam frequencies
up to 1GHz.

Text & Image by


Aditya Ramane

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