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  • jammer
  • fm
  • transmitter
Related

schematic help

dirtdiver
dirtdiver over 13 years ago

Hi everyone,

now my question isnt arduino related , but i couldnt get the answer somewhere else so i thought that some of you guys might know the answer.

OK so i have a schematic for an FM jammer/transmitter - its both as it jamms the signal by transmitting nothing.

image

I want to change that nothing to a something (and i know for a fact that its posible with that schematic)So I need to hook up a 3.5mm jack somewhere on that schematic, my gues would be to connect it between the 0.01uF cap and GND , but am I correct? if not do you know where am i supposed to connect it to?

Again sorry that its not arduino related but any help is highly appreciated!

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  • Former Member
    Former Member over 13 years ago in reply to dirtdiver +1
    You are building an FM transmitter. You don't put an ear piece on the transmitter thats what the receiver is for.
Parents
  • Former Member
    0 Former Member over 13 years ago

    You will need a little more then that to add audio. Check this out.

    image

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to Former Member

    Crap.Ok first is the electret mic like a 3.5 mm jack? I mean can it be replaced with one?

    And this guy made it work with a  schematic using only one transistor and he claims that he used that exact schematic, he just cant remember where he wired the 3.5mm.Are you absolutely positive that it wont be so easy?

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to Former Member

    Ok, so i guess i will have to go with the schematic you provided, and again, can i replace the mic witha  3.5mm in that circuit?

    And what are the properties of L1 how many turns ?AWG  diameter?

    Thansk

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  • Former Member
    0 Former Member over 13 years ago in reply to dirtdiver

    Yes the mic can be replaced by a 3.5mm jack or any other audion jack/source you want to use. Use 6 to 8 turns of 22ga wire around a pencile for L1.

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to Former Member

    Ok thatnks for the info!

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to R_Phoenix

    where to connect a ear peice

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  • Former Member
    0 Former Member over 13 years ago in reply to dirtdiver

    You are building an FM transmitter. You don't put an ear piece on the transmitter thats what the receiver is for.

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  • R_Phoenix
    0 R_Phoenix over 13 years ago in reply to Former Member

    Michael Pilcher wrote:

     

    You are building an FM transmitter. You don't put an ear piece on the transmitter thats what the receiver is for.

    I think that was my misinterpretation. dirtdiver said "3.5mm jack somewhere on that schematic" and I "assumed" headphone jack.

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to R_Phoenix

    the male 3.5 mm jack image

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  • Former Member
    0 Former Member over 13 years ago in reply to dirtdiver

    Like i said you can place any kind of connector you want in place of the mic. Whatever connector you feel you need to get audio into the circuit.

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  • michaelkellett
    0 michaelkellett over 13 years ago in reply to Former Member

    I must be getting old but I think I should point out that it is almost certianly illegal to operate this cicruit in most places in the world - it's certainly rather antisocial to do so where the signals might interfere with other people's legal use of the RF spectrum.

     

    Michael Kellett

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to michaelkellett

    as far as i know in bulgaria its legal as long as it doesnt have an antena, but thanks for the concern image

    and that is intended for practical jokes

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  • dirtdiver
    0 dirtdiver over 13 years ago in reply to michaelkellett

    as far as i know in bulgaria its legal as long as it doesnt have an antena, but thanks for the concern image

    and that is intended for practical jokes

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