DIY FM Transmitter

25

Here is a nice and simple FM transmitter from David at Volunteer Lab Rat that will let you blast your iPod tunes on your stereo. Full details are provided on the site.

“You know these smart FM transmitters you can use to stream music from your iPod into your car stereo? Here’s a nice little project that I’ve made and that you can build yourself for around 5$. It’s my homebuilt FM transmitter that I use for streaming music into my car stereo and the old-school stereo at the metal workshop at my university! The awesome thing is that the transmitter is based on only one transistor, and is really simple to construct.”

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25 Comments


  1. Haha! nice use of what looks to be a microchip sample box 😉 …still hate ipods though


  2. Very neat. It looks like you have built a single frequency voltage controlled oscillator. I like it!


  3. Hi Rol3ert!

    You’re absolutely right, it is a microchip sample box in which i recieved 2 PIC processors for making a 4-axis CNC controller.

    NGinuity, Good guessed, thanks for the kind words


  4. I thought I would be the first to guess it was a microchip box. oh well. Very nice project.


  5. David,
    Do you have a link to your CNC controller? That is something I am into as well.


  6. Solemn article. It make me lost in thoughts.


  7. Hi NGinuity!

    I’m still working on it! I’m building a 3 axis CNC milling machine ans a 4 axis CNC controller board. I can give you some specs on it though:

    Parallel port based
    4 axis control
    Manual mode with axis control through 4 rotaty encoders/jog wheels
    LCD display to show machine coordinates and to set up the controller
    Capable of handling 24A to feed the motors.

    The progress on the milling machine so far can be seen here:

    http://www.volunteerlabrat.com/cnc.jpg

    When it’s all done, I’ll try to get it posted on hackedgadgets.

    Best regards
    David


  8. Hey David. I have an email coming to you. Stand by 🙂


  9. Ive just brought a 175.000mhz Microphone system with 2 Microphones one of the microphones sadly has seen better days but what i did was is use the insides to create a Audio Transmitter and being legal as its got an exempt frequency ive adapted it and remove the microphone part and soldered a Phono connection to it plugged it in my laptop and hey presto it works.. 🙂

    Regards..
    Lee


  10. Man! I just payed $20 for one at RaidoShack!


  11. hey, nice. Im new at these electronic stuff. Hope you can help me out, I recently bought Scosche IPTRNSX FM transmitter, and was looking for help to modify it since I cant find the antenna. Any help will be great, Email: Reigntrs8@gmail.com


  12. Good! All it needs now is a power input to sap the iPod’s instead of draining a 9volt. And maybe an antenna, which is easy enough.


  13. I am decent with elecrtonics, can solder, etc.
    But i dont understand which parts to get and what the abbreviations, such as “C4 C5” etc are
    And i am guessing the are capacitors?
    But is there a specific type of (Capacitors, transistors, ets) i need to get?


  14. Hi Imran,

    Click on the link above, then click on the image on the project page to open the project zip file. One of the PDF images within there have component values listed. Yes C indicates a capacitor and R indicates a resistor.


  15. Well
    Im not finding it
    I have 2 pdfs i can use
    1 is fmtrans_withparts
    and other is fmtrans_noparts or something
    then there are 2 under mac folder that i cannot open
    Thanks for help so far, and thanks for anymore help yo can give


  16. Have a look at the one that is listed with parts. Beside each component the value of the part is listed.


  17. NEW FM TRANSMITTER FROM 20W TO 60W FROM ELETEC FRANCE


  18. Hello,

    I looked at your FM Transmitter and I was interested in making my own as well. But I needed the schematic for it so I can make one. I was wondering if you had the schematic to your FM Transmitter above and if you did I was wondering if you could upload that on to your site or better yet email it to me. That would be awesome. Thanks!!!! Hope to her from you soon!


  20. Hello,

    I have looked at the project site, but it is difficult to understand the PCB layout that you have uploaded on the project website. So I was wondering if there was a simpler schematic that you might have that I can look at that is not on a PCB layout or anything like that, but maybe hand drawn or drawn using computer software like PSPICE or Electronic Workbench or something like that. Please let me know.

    Thank You.


  21. Hello,

    I was wondering if you would be able to explain the circuit to me briefly. For example, why did u choose the values you chose for the resistors and capacitors and etc and what some of the parts of the circuit do. I know that the trim capacitor is able to determine what frequency the transmission occurs at and you can change that frequency by changing the value of the trim capacitor but can you explain some of the other parts to me. That would be great if you can.

    Thank you very much. Hope to hear from you soon.

    John S.


  22. The 99 cent only store near me has a iRiver FM transmitters. I picked up 5. One of these day’s I’ll tear them apart and do something awesome that includes integrating USB stuff to it.


  23. It’s cool what you can get for a dollar sometimes. Let us know how the project turns out!

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