other networks

Build Your Own Mini FM Transmitter

Our other networks for everyone booklet “Build Your Own Mini FM Transmitter” has been printed and we will be sending out hard copies to those who requested them very soon! If you were unable to request a physical copy, you can view or download the PDF here:

FMTransmitterDownload

Many many thanks to everyone for the outpouring of support for this project!

Note: This is a corrected PDF. We made an error in editing and a 10pF ceramic capacitor (correct) was mistakenly listed as a 1µF ceramic capacitor (incorrect). If you have a printed copy, or have already downloaded a copy, the corrections are on pages 25, 41, 47 (two locations), and 48 (two locations). Many many apologies for the error! Find & replace is tricky!

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5 responses to “Build Your Own Mini FM Transmitter”

  1. Todd Viola Avatar
    Todd Viola

    Hello! I’m intrigued by this little book, and I’m starting to get my components together to build the transmitter. I have a question about the parts list on page 25. The list refers to a 1µF ceramic capacitor (unsually marked with a “100”). when I consult a capacitor table, I see 1µF associated with code 105. Code 100 is 10pF.

    Can you please clarify? Should I be using a 1µF capacitor, or perhaps 10pF?

    The same wording also appears on page 41 in the assembly instructions.

    Thanks!Todd Viola

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    1. Lori Emerson Avatar
      Lori Emerson

      Hi Todd, thank you for asking – and apologies for the small typo that crept in! Please use a 10pF capacitor. We will correct the error in the pdf version. yours, Lori & libi

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  2. tim Avatar
    tim

    The circuit diagram (ie. section 3.0 page 23) shows the audio input being tied to ground, but the build instructions (ie step 15 page 44) does not.

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    1. roselibi Avatar
      roselibi

      If you re-read step 15 on page 44 you’ll note that it instructs you to insert the positive wire from the audio jack in the same breadboard row as the negative leg of the electrolytic capacitor, and to insert the negative wire from the audio jack in the negative rail on the breadboard. that negative rail is the tie to ground.

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      1. tim Avatar
        tim

        But in the circuit on page 23 it shows that the negative terminal of the 1uF cap is tied to ground, not indirectly through the microphone, but directly wired to ground. The circuit will not work if you do that.

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