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Fm Transmitter for MP3

Discussion in 'Electronic Basics' started by John, Feb 27, 2004.

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  1. John

    John Guest

    Wife just got me an MP3 player for b/day.
    Does anyone have any ideas or schematics for a low power transmitter that I
    can connect to the player and receive on my car stereo in an unpopulated
    part of the normal FM band 88-108Mhz.

    Thanks.
     
  2. You can get one ready made for $17.95 (which is probably much cheaper than
    you could build one for).
    http://www.mp3playerstore.com/stuff_you_need/accessories/FM-02.htm
     
  3. Genome

    Genome Guest

    Exchange it for a rubber suit and some vaseline.

    Do a Google on crossdressing and ask the Woodgate about washing up.

    DNA
     
  4. Jerry G.

    Jerry G. Guest

    You can get one much cheaper and more stable than you can make home made.
    Radio Shack and many of the home audio stores sell these. Some of them call
    it an FM sender, or FM Transmitter. Just tell them what you want.

    I use one from Radio Shack, and it works very well.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    Wife just got me an MP3 player for b/day.
    Does anyone have any ideas or schematics for a low power transmitter that I
    can connect to the player and receive on my car stereo in an unpopulated
    part of the normal FM band 88-108Mhz.

    Thanks.
     
  5. Genome, you're a classic example of recursion. Your head is so far up
    your ass it pops out again on top of your neck.
    gg
     
  6. I read in sci.electronics.design that Glenn Gundlach
    Doesn't that make him a Klein bottle?
     
  7. A Klein bottle with a groß bottle.

    Best regards,
    Spehro Pefhany
     
  8. Ian Stirling

    Ian Stirling Guest

    Wouldn't the procedure make a Dirty bottle?
     
  9. John

    John Guest

    Well, what do you know, nice to see you intelligent, intellectual and
    supportive guys that make the world 'tick' have something constructive AND
    of interest to mumble, I am so glad to have posted here.

    John.
     
  10. Dave VanHorn

    Dave VanHorn Guest

    Nothing prevents you from persuing your project.
    But the fact remains that this device already exists, and volume production
    has pushed the price down lower than you could buy the components for.

    Stereo encoding isn't simple. You'll also have a bit of a time with the PLL
    design, since FM transmitters are wideband FM, and the PLL will "fight" you.
    FMing the reference osc works, but then the deviation changes as you change
    output frequency.

    Do you think you can solve all these problems for less than the price of a
    good lunch?
     
  11. John

    John Guest

    Thanks Dave.
    No, but now you have been gracious and polite enough to advise me on the
    difficulties I understand the reasons and can find another project. But
    unless someone advises (teaches) then how is one to know.
    John.
     
  12. Genome

    Genome Guest

    I like that.

    Interesting, I thought my head was so far down my neck it had popped out of
    my ass

    DNA
     
  13. Dave VanHorn

    Dave VanHorn Guest

    If you want to do it to learn about PLLs, and stereo encoding, then by all
    means go for it.
    Frequently, my projects cost way more than it would to just go buy one.
    But if you're doing it to save cost, you're barking up the wrong tree.

    My current "project" has been quite educational, at the expense of >$1.5M
    :)

    There are some FM transmitter kits that might do the educational end, while
    allowing you to start with a design that is known to work. Look on the
    Ramsey website.

    I've always said, "When I'm done learning, get a shovel".
     
  14. With emphasis on _tell_. If you ask them a question, they'll have the
    answer, alright, only it'll be the wrong answer!
     
  15. The problems have already been solved. See the Rohm BH1416 data sheet
    for a schematic.

    http://transmitters.tripod.com/rohm_bh.htm
     
  16. Fred Stevens

    Fred Stevens Guest

    Maxim/Dallas Semiconductor has a chip that does what you want - if
    your eyesight is good enough to solder it onto a board!

    Fred.
     
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