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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

122 comments:

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

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

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

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

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

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  5. What is the metal of the coil ?

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  6. You can use copper or silver metal

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  7. pls snt me the part no of atena

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  8. don't understand your q plz explain

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  9. 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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  10. 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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  11. can u suggest what antena should be used to generate a frequency >800MHZ

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  12. 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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  13. 222nh is available in market or we have to make it

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

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  16. 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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    Replies
    1. how i can make it work in lebanon (
      asian)

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  17. 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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  18. am from india can u help me out

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  19. 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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  20. Hi Mr. UK

    Saifullah is out of country please wait few days

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

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  22. 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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  23. 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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  24. 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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  25. 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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  26. would really appreciate a detail guide n description of how to go abt the simulation with proteus isis..thnks

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    Replies
    1. 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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  27. 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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  28. 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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  29. See this video http://www.youtube.com/watch?v=vyBMI91AaxY

    and thought this

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

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

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  32. UK
    Yes i have received Your mail

    Best Regards

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  33. Alright, eagerly waiting for the response..many thanks

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

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  35. Alright, M waiting, thanks

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  36. Alright, I'm still waiting

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

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  38. can i use this circuit will block cell phone usage

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

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

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

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  42. I think like alluminiyao mix steel coted

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

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

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  45. Y ? Rasnu Try again Try and get target

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

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

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  49. This comment has been removed by the author.

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

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  51. Same circuit wii be work at chennai,india

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

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  53. how many turn copper wire for this circuit?

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  54. 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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  55. 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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  56. Aswinth raj
    I think Same circuit will be work at india

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  57. 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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  58. 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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  59. 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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  60. Jhoh Samuel where u from ?

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

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

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

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  66. 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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  67. this project rerly work s aswm

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

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

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

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

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

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

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

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  79. 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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  80. 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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  81. 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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  82. 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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    Replies
    1. 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

      Delete
    2. 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

      Delete
  83. 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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  84. 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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  85. 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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  86. plz send me this project(mobile jammer) .which based on microcontroller(embedded system).my id is ullah359@gmail.com

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

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

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

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

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  92. If work then other wise use only yagi antenna

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  93. any other alternatives for bf494 transistor ..???

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

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  96. 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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  97. 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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  98. 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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  99. 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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  100. 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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  101. ay alternate for BF494 transister

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  102. any alternate for transister BF494

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

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    2. 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.

      Delete

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