,

Simple Mobile Phone Jammer Circuit Diagram


Description
                 Circuit showing a mobile phone jammer.Here i have used a fm transistor for making this circuit.Mobile phones are working in 450  MHz  frequency .Here the transmitter generate almost equal to 450 MHz  frequency there for the mobile phone does not identify the original signal but the signal range is very week so this circuit working in only 100 m range .This circuit working in only 450 Mhz .Do not give more than 3 V



Part List

Component No: Value  Usage
R1 100R  Emitter loading
R2 39k   Base Biasing
C115 pf  Frequency
 Generating
C24.7pf  Feedback
C3 4.7pf  Feedback
C4102pf  Noise Reduce
C5 1MFCoupling
C6 2.2pf  Coupling
C7    103pf    Decoupling 
Q1 BF 494  Amplification
L1 22nH Frequency
 Generating

Applications

* FM Transmission

* TV Transmission

* Remote Controlled Toy
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123 comments

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Rose Marry
AUTHOR
13 July 2013 at 10:41 delete

Thanks, Good explanation. Keep it up.

upcoming sony phones

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Farhan Ahmad
AUTHOR
1 August 2013 at 16:33 delete

this circuit works ??? if not working in my case , then what to do for troubleshooting???

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mani kandan
AUTHOR
10 August 2013 at 03:35 delete

thanks i have a doubt.what is the number of antina???plz say ........

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10 August 2013 at 12:20 delete

Analog antina / switch,SPDT,1.8V~5.5V,3 Ohm,TSOP-6

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mani kandan
AUTHOR
21 August 2013 at 08:13 delete

Thanks Saifullah and pls i have another one doubt what is the value of resistor 100R .plz say ... and advance thanks

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22 August 2013 at 01:39 delete

well mani its my pleasur . European way of writing 100 ohm..
They place the letters R , K ,or M where the decimal point goes.
For instance

2K2 = 2.2 Kohm
100R = 100 ohm
1M2 = 1.2 Mohm

R = ohms
K = kilohms
M = Megohms

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mani kandan
AUTHOR
22 August 2013 at 08:31 delete

nice explanation Saifullah and once again thanks for ur info.its more useful for me .keep it up........

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mani kandan
AUTHOR
25 August 2013 at 08:48 delete

hey thanks then i want to design electronic circuit so plz suggest me for how to design thanks

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28 August 2013 at 08:14 delete

What is the metal of the coil ?

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28 August 2013 at 10:23 delete

You can use copper or silver metal

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mani kandan
AUTHOR
7 September 2013 at 03:29 delete

pls snt me the part no of atena

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7 September 2013 at 11:56 delete

don't understand your q plz explain

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mani kandan
AUTHOR
8 September 2013 at 00:26 delete

hey u said antina tsop-6 package isn't but i cant find out the model so send the part number of the antena or send the detail description about antena pls i make ur project it is success so i want to transmit and check the signal so plz

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8 September 2013 at 09:37 delete

Dear mani part number is DG2001 The most important part of any transmitter is the antenna, so a suitable antenna should be selected

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varma
AUTHOR
13 September 2013 at 20:18 delete

can u suggest what antena should be used to generate a frequency >800MHZ

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mani kandan
AUTHOR
14 September 2013 at 04:38 delete

thanks saifullah keep it up

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14 September 2013 at 06:19 delete

Hi varma ! Yes i suggest you, you should be used yagi antenna to generat a frequency 800 Mhz or 1900 MHz, but not both.

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14 September 2013 at 06:20 delete

welcome mani its my pleasure

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18 September 2013 at 05:43 delete

222nh is available in market or we have to make it

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18 September 2013 at 11:21 delete

Yes 22nh is available in market

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18 September 2013 at 23:15 delete

it is my first project related to antina so can you please tell me any real life example where this antina is used which you have mentioned above....

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Sweet Fairy
AUTHOR
19 September 2013 at 02:30 delete

Great design. I appreciate your effort. Thanks for sharing. cep telefonun

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19 September 2013 at 08:17 delete

Pulkit Jaiswal Where you from ? if you are Asian that's not work in Asian countries this project work only USA and European countries

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19 September 2013 at 08:24 delete

If you wanna detail about yagi antenna cotact here store, located at 2827 Live Oak St, Dallas, Texas 75204 - (214) 774-2588 or toll free (888) 713-1243.
214-744-2588 CST - M-F
888-713-1243 Toll Free

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Mayur Nag
AUTHOR
29 September 2013 at 12:17 delete

am from india can u help me out

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30 September 2013 at 20:20 delete

yes Mayur Tell us your problem

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U K
AUTHOR
9 October 2013 at 06:35 delete

Hello Saifullah..., Thanks for sharing, I'm using f =1/2*3.141(sqrt L*C) to calculate the frequency, but I'm getting 277Mhz, How do i generate a frequency of 900Mhz for the GSM JAMMER?Also what will be the output when simulated?..M xpecting Ur reply..Thanks.

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9 October 2013 at 20:24 delete

Hi Mr. UK

Saifullah is out of country please wait few days

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9 October 2013 at 20:43 delete

We suggest you u can using this formula F= 1/ (2*pi*sqrt (L*C)).

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U K
AUTHOR
10 October 2013 at 07:47 delete

Oooooo.....h!,I've used this formula and getting 277Mhz from the calculation,but i needed 900Mhz, and also my simulation output(19.357) is far below the calculated value, what do i do now plss.. thnks in anticipation of an answer.....

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U K
AUTHOR
14 October 2013 at 10:47 delete

Hello....M having some difficulties in the simulation of this circuit, please how do i measure the frequency signal generated, would be grateful if U show the detail of the connections.. Thanks

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16 October 2013 at 05:12 delete

A function generator has a frequency range and we can get varying amplitude from its main output. We can verify its frequency and wave shapes by applying its output to oscilloscope.
Frequency & Time Period Measurement

Connect the signal to be measured to CH1 / CH2. Also switch the channel.
Set the volts per division knod and time per division knob to obtain a normal waveform.
Keep the VAR SWEEP control to CAL.
Using POS control, adjust the references at the centre of horizontal and vertical line.
Measure the Horizontal distance between two points. Multiply this by the Time/Div control and magnification: Time = Horizontal divisions X Time / Div (X (1/10) if X10 is used)
Frequency measurements are made by measuring the time taken by one cycle, Frequency1/Time period.

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U K
AUTHOR
19 October 2013 at 00:23 delete

Hello....m appreciate Ur patience, M trying to run the simulation of the circuit using a proteus isis but it's not workn, i guess i must be making a mistake in smthngs may be,please can U help? thanks

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U K
AUTHOR
19 October 2013 at 00:25 delete

would really appreciate a detail guide n description of how to go abt the simulation with proteus isis..thnks

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19 October 2013 at 07:44 delete

Hi Uk
Uk Tell us your email address we can send a other project of mobile phone jammer go to contact us form

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19 October 2013 at 08:02 delete

The Proteus Design Suite is wholly unique in offering the ability to co-simulate both high and low-level micro-controller code in the context of a mixed-mode SPICE circuit simulation.

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19 October 2013 at 08:10 delete

See this video http://www.youtube.com/watch?v=vyBMI91AaxY

and thought this

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U K
AUTHOR
21 October 2013 at 02:24 delete

Hello Saifullah...M have sent the email.thanks

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U K
AUTHOR
21 October 2013 at 08:50 delete

Hello Saifullah...M have sent the email, Have U received it?...thanks

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21 October 2013 at 10:11 delete

UK
Yes i have received Your mail

Best Regards

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U K
AUTHOR
22 October 2013 at 18:03 delete

Alright, eagerly waiting for the response..many thanks

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23 October 2013 at 10:10 delete

Kindly wait Few Days we will send you a best jammer project

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U K
AUTHOR
27 October 2013 at 15:34 delete

Alright, M waiting, thanks

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U K
AUTHOR
28 October 2013 at 05:56 delete

Alright, I'm still waiting

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ps tech
AUTHOR
28 October 2013 at 23:46 delete

thanks provide internal working about mobile phone jammer in noida
is most important knowledge

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4 November 2013 at 22:32 delete

can i use this circuit will block cell phone usage

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4 November 2013 at 22:35 delete

thanks,
can i use this circuit will be ban cell phone usage

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5 November 2013 at 10:16 delete

You will try This Life is Hard so Try and again try

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sai dinesh
AUTHOR
7 November 2013 at 06:46 delete

if we are intending do the same project in india..then which type of antenna should v use?

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19 November 2013 at 22:48 delete

I think like alluminiyao mix steel coted

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Hashir Ansari
AUTHOR
25 November 2013 at 08:45 delete

will same circuit works in mumbai,,india???

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26 November 2013 at 09:21 delete

I think it work! but not trusted

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Rasnu
AUTHOR
1 December 2013 at 00:10 delete

Hi This is Rasnu.
i had many ideas but i can't do any project.

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Jhon son
AUTHOR
3 December 2013 at 09:08 delete

Y ? Rasnu Try again Try and get target

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7 December 2013 at 21:54 delete

i hv made the circuit but isnt workin m from india can u help me with the project ?
thanks in advance

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Jhon son
AUTHOR
8 December 2013 at 20:12 delete

Sushmita you will send you email via our contact us form we send a other project

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maria
AUTHOR
10 December 2013 at 09:42 delete

i'm from india.what all changes i have to make in this circuit to achieve the target?

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Jhon son
AUTHOR
10 December 2013 at 21:39 delete This comment has been removed by the author.
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Jhon son
AUTHOR
10 December 2013 at 21:41 delete

you will send your email address via our contact us form we send an other project

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12 December 2013 at 19:42 delete

Same circuit wii be work at chennai,india

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Asif Raza
AUTHOR
14 December 2013 at 20:26 delete

Hi... Can you send me brief description of this circuit.. my e-mail id is asifraza0765@yahoo.com

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said fezil
AUTHOR
18 December 2013 at 02:26 delete

how many turn copper wire for this circuit?

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Jhon son
AUTHOR
18 December 2013 at 20:18 delete

6 turns of copper wire

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Arun Sankar
AUTHOR
18 December 2013 at 23:46 delete

hi, Im going to make this circuit as my project, is it work properly or facing errors.. if any correction needs ????

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aswinth raj
AUTHOR
19 December 2013 at 22:43 delete

i am an indian i want to know the changes made in this circuit.. if y want my may id:as.win.th36@gmail.com..
pls ia m waiting fr ur rply n tnks n advance

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Jhon son
AUTHOR
20 December 2013 at 09:14 delete

Aswinth raj
I think Same circuit will be work at india

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Jhon son
AUTHOR
20 December 2013 at 10:05 delete

All india visit this and enjoy mobilephon jamer a http://circuitsstream.blogspot.com/2013/12/a-gift-mobile-phone-jammer-circuit.html

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John Samuel
AUTHOR
9 January 2014 at 08:33 delete

Hi i'm not able to get 22nH in my place. Can I make it? If yes how can I make it.. Please tell me in detail.

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John Samuel
AUTHOR
9 January 2014 at 08:50 delete

22nH inductor is not available in my place. can I make this myself? If yes how can I make it? Please tell me in detail

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Jhon son
AUTHOR
12 January 2014 at 22:39 delete

Jhoh Samuel where u from ?

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Athul Tv
AUTHOR
13 January 2014 at 20:30 delete

Hi my name is athul.i'm frm kerala,india. I intrested in it to do it as my mini project. Can you please snd me all details and pcb layouts. My submission date is near.i didnt get components of other jammer ckt.i got bf494.so i think i can get other part too.pls help me.thank u.

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Athul Tv
AUTHOR
13 January 2014 at 20:32 delete

Pls snd me other simple circuit if u hav.i need a better project.

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John Samuel
AUTHOR
15 January 2014 at 19:27 delete

I'm from Tamil Nadu, India

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Jhon son
AUTHOR
15 January 2014 at 23:01 delete

Athul Tv You will send your e mail adress via our contact us form we can send a simple and complete project for u

Best regards

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Jhon son
AUTHOR
15 January 2014 at 23:07 delete

John Samuel you will get 22nh on internet buy this inductor easily

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John Samuel
AUTHOR
16 January 2014 at 00:27 delete

can u plz tell me the website where i can get this?

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Jhon son
AUTHOR
16 January 2014 at 09:22 delete

This one http://www.aliexpress.com/w/wholesale-0603-22nh-2%2525-inductor-.html
or
http://uk.rs-online.com/web/p/wire-wound-surface-mount-inductors/7242848/

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Arun Tyrent
AUTHOR
27 January 2014 at 06:44 delete

this project rerly work s aswm

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Pawan Giri
AUTHOR
27 January 2014 at 22:01 delete

how the projects works it jam both CDMA GSM mobile signal and whats is final cost

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unni krishnan
AUTHOR
30 January 2014 at 21:38 delete

need coil specifications,as its gage,number of turns ,distance betewen the adjesent turns,

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unni krishnan
AUTHOR
30 January 2014 at 21:40 delete

hai,i am unni from kerala .i need a detailed design for each components for mini project

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Jhon son
AUTHOR
3 February 2014 at 09:08 delete

Pawan GSM/CDMA/3G signals have a frequency of 800-900MHz, 1800-1900MHz and 2100-2200MHz (last one is 3G). VHF band uses 300-300MHz, and UHF band is a wide band with 300-3000MHz frequencies but as a rule microphones are not using high frequencies for their work. UHF/VHF jammer blocks only the most used parts of those bands - 140-180MHz from VHF and 450-480MHz from UHF.
As you can see, all you need to do is to make sure you have low-frequency microphone that would not be jammed by your cell phone jammer. And if someday you would need to jam both mobile phones and low-frequency band, you still can do it and its final cost $50 to $100

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unni krishnan
AUTHOR
4 February 2014 at 06:52 delete

tanks,but i need gage of the copper wire and distance between the adjecent turns.

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aswinth raj
AUTHOR
7 February 2014 at 05:22 delete

hi sir!
i am working on this circuit for past 3 months. i am from india i need to block signals from 900 to 1800 to make it work both for GSM and CDMA.. please help and is this yagi antenna relly nesasary

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Jishnu Np
AUTHOR
8 February 2014 at 04:02 delete

will u kindly snd me the equivalent circuit that work in india....my mail id-jishnu.jish93@gmail.com

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Jhon son
AUTHOR
8 February 2014 at 09:29 delete

Hi
aswinth raj and jishnu NP I will send you a project i hope that work in india but wait few days because i am bzy at other project

Best Regards

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Johnson John
AUTHOR
11 February 2014 at 21:14 delete

Can u please send circuit for 900 mhz mobile phone jammer. my email id is johnsonnakram@gmail.com

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Jhon son
AUTHOR
13 February 2014 at 13:07 delete

After having huge requested of Johnson John, Jishnu Np, aswinth raj and others. we are going to start dual band mobile jammer for GSM 900 and GSM 1800 Full and final project see this project and enjoy you self

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Zaeem Khan
AUTHOR
18 February 2014 at 09:34 delete

can we use here a simple antenna from
a radio or a walkie talkie set

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Zaeem Khan
AUTHOR
20 February 2014 at 07:04 delete

so which type of antenna i should buy?
can u give me it's model num? or any other particular specification?

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Akash Bansal
AUTHOR
21 February 2014 at 10:45 delete

sir, i want to make mobile phone jammer in collage class room so pls give me advise how can design jammer and what to do possible , pls sir help me this most important in my life becoz this my frist project

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Akash Bansal
AUTHOR
21 February 2014 at 10:52 delete

sir,i want to make mobile phone jammer at collage class room but sir i dont know design this project pls help me and this project vary important in my life pls sir help me how can be possible i make this project....

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Jhon son
AUTHOR
22 February 2014 at 09:36 delete

Akash
you can try this project dual band mobile jammer for GSM 900 and GSM 1800 Full and final project see this project and enjoy you self

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26 February 2014 at 09:13 delete

hi i m amar from india....i need the circuit of mobile jammar which can produce high frequency i.e. frequency of present mobiles.. plzzzz plzzz help me....

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26 February 2014 at 09:16 delete

i need a mobile jammar circuit which can produce frequency equivalent to present mobiles we get in market....which can jam all mobiles....plzzz help ....i need suugestion ...

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vivaan yadav
AUTHOR
7 March 2014 at 03:03 delete


Thanks for the sharing of such information. we will pass it on to our readers. This is a great reading. Thanking you.
Mobile Phone Jammer

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Aman Ullah
AUTHOR
11 March 2014 at 05:18 delete

plz send me this project(mobile jammer) .which based on microcontroller(embedded system).my id is ullah359@gmail.com

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emi
AUTHOR
28 March 2014 at 01:53 delete

hi , i want ur help plz suggest me .what is the number of antina to generate 450 mhz frequence generate

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31 March 2014 at 17:37 delete

hii sir
i m from india. i want to make a signal jammer for gsm cdma. pls send me circuit and detail for project which work.
my email id is sanucool38@gmail.com
pls reply

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31 March 2014 at 17:40 delete

hii sir
i want to make a jammer. pls help me

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4 April 2014 at 03:16 delete

can we take antennas from radio?...

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4 April 2014 at 03:56 delete

can we take antennas from radio?............!!

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4 April 2014 at 09:49 delete

If work then other wise use only yagi antenna

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6 April 2014 at 07:24 delete

any other alternatives for bf494 transistor ..???

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Danish
AUTHOR
15 April 2014 at 02:27 delete

There is a problem in the value of electrolyte capacitor (C5) in digram is 1u whereas in list it is 1M which ine is correct??

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aswinth raj
AUTHOR
17 April 2014 at 02:25 delete

SIR!
i still cant get it. i am doing a project in which jammer makes only a littel, i cant followhttp://circuitsstream.blogspot.in/2014/02/the-final-cell-phone-jammer-circuit.html this full link to make a jammer for asia. moreover i cant understand why that jammer circuit alone looks complicated where as the one in this page looks much simple.
PLEASE HELP;
i need a simple circuit of jammer that could work in india
anyway thank u for ur effort in making that new page i relly got some good ideas

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aswinth raj
AUTHOR
17 April 2014 at 02:27 delete

SIR!
i still cant get it. i am doing a project in which jammer makes only a littel, i cant followhttp://circuitsstream.blogspot.in/2014/02/the-final-cell-phone-jammer-circuit.html this full link to make a jammer for asia. moreover i cant understand why that jammer circuit alone looks complicated where as the one in this page looks much simple.
PLEASE HELP;
i need a simple circuit of jammer that could work in india
anyway thank u for ur effort in making that new page i relly got some good ideas

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emi
AUTHOR
20 April 2014 at 11:16 delete

i also fece this problem plzz give me its solution.... 2days r left for submisstion of my university project kindle reply

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Asif Shajahan
AUTHOR
23 April 2014 at 10:21 delete

what is the number on the capacitor of 103pf?pls solve my problem

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23 April 2014 at 23:57 delete

Asif 103pf cap. 103 means 10 x 10*3 pf, or 10 x 1,000 pf. 10 nf is equal to 10000 pf.103 is equal to 10000 pf.10 + 3 means 3 zero.

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24 April 2014 at 00:03 delete

veeramani kandan you can use the mpsh10(rotated 180 deg) in place of a bf494(like I did). The bc548 > ksp2222a is also fine

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hadi
AUTHOR
2 May 2014 at 02:42 delete

how i can make it work in lebanon (
asian)

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agha Pradipta
AUTHOR
5 May 2014 at 07:46 delete

i found same post on other blog, and the notes says " Increase the inductor capacitor circuit components value for increasing the frequency." can i use this way? and can you explain me what is formula F= 1/ (2*pi*sqrt (L*C))? please

sorry for my english.
agha.alwayson@gmail.com

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5 May 2014 at 10:49 delete

Agha (Increase the inductor capacitor circuit components value for increasing the frequency) try it and formula is

f = 1/(2*pi)[(L*C)^(1/2)]

2*pi*f = 1/sqrt(L/C)

Let w = 2*pi*f (angular velocity)

w = 1/sqrt(LC)

wsqrt(LC) = 1

w^2 = 1/LC

LC = 1/w^2

L = 1/(C*w^2) = 1/(4C*pi^2*f^2)

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agha Pradipta
AUTHOR
7 May 2014 at 05:56 delete

which capacitor i must to increase the value? all of them?.

and can i make jammer with multiple frequency (ex: 800mhz, and 100mhz) in one PCB? and two swicth beetwen 800mhz and 100mhz i use a electric swicth? can i use this?

sorry for my english. Thanks for your Help

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Kbs Naidu
AUTHOR
17 July 2014 at 23:51 delete

ay alternate for BF494 transister

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Kbs Naidu
AUTHOR
17 July 2014 at 23:52 delete

any alternate for transister BF494

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20 July 2014 at 04:37 delete

You can use the mpsh10(rotated 180 deg) in place of a bf494

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20 July 2014 at 04:40 delete

BC548, BC549, or 2N3904 should do you a good source for them is Mouser although they don’t have BF494 in stalk . and Check the Ft of the BF494 (200Mhz) and match it with what you can get locally. The BT494 is a pretty damned fast little transistor, so be careful.

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Kashyap Nagar
AUTHOR
13 April 2015 at 13:23 delete

Hiii sir i want full description about this ckt and how can we use it can u plzzz send full description about this ckt ??? My email id is kashyapnagar2151996@gmail.com

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