# Fm Transmitter for MP3

J

#### John

Jan 1, 1970
0
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.

M

#### michael turner

Jan 1, 1970
0
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.

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 G #### Genome Jan 1, 1970 0 John said: 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. Exchange it for a rubber suit and some vaseline. Do a Google on crossdressing and ask the Woodgate about washing up. DNA J #### Jerry G. Jan 1, 1970 0 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. G #### Glenn Gundlach Jan 1, 1970 0 Genome said: Exchange it for a rubber suit and some vaseline. Do a Google on crossdressing and ask the Woodgate about washing up. DNA 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 J #### John Woodgate Jan 1, 1970 0 I read in sci.electronics.design that Glenn Gundlach 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. Doesn't that make him a Klein bottle? S #### Spehro Pefhany Jan 1, 1970 0 I read in sci.electronics.design that Glenn Gundlach Doesn't that make him a Klein bottle? A Klein bottle with a groß bottle. Best regards, Spehro Pefhany I #### Ian Stirling Jan 1, 1970 0 In sci.electronics.design John Woodgate said: I read in sci.electronics.design that Glenn Gundlach Doesn't that make him a Klein bottle? Wouldn't the procedure make a Dirty bottle? J #### John Jan 1, 1970 0 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. D #### Dave VanHorn Jan 1, 1970 0 John said: 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. 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? J #### John Jan 1, 1970 0 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. G #### Genome Jan 1, 1970 0 Glenn Gundlach said: 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 I like that. Interesting, I thought my head was so far down my neck it had popped out of my ass DNA D #### Dave VanHorn Jan 1, 1970 0 John said: 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. 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".

W

#### Watson A.Name \Watt Sun - the Dark Remover\

Jan 1, 1970
0
Jerry said:
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.

With emphasis on _tell_. If you ask them a question, they'll have the

W

#### Watson A.Name \Watt Sun - the Dark Remover\

Jan 1, 1970
0
Dave said:
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?

The problems have already been solved. See the Rohm BH1416 data sheet
for a schematic.

http://transmitters.tripod.com/rohm_bh.htm

F

#### Fred Stevens

Jan 1, 1970
0
Watson A.Name \"Watt Sun - the Dark Remover\" said:
With emphasis on _tell_. If you ask them a question, they'll have the

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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