Connect with us

RFID Toys

Discussion in 'Electronic Design' started by Al, Dec 31, 2006.

  1. Al

    Al Guest

    The other day, a friend came over for lunch and brought a gift she had
    received. It was a baby grand piano, about 1 foot long, that had a mouse
    dressed in holiday clothes playing it.

    OK, here's the good part. The tune it would play would be selected by a
    1/8th inch block a little larger than a large postage stamp. Each of the
    blocks she had looked like sheet music. On the front was printed the
    name of the musical piece.

    When you placed the block on the music stand, the mouse would play the
    piano with that music. At the beginning and at the end, the mouse would
    make comments.

    It seems to me that the piano is activated by an RFID tag in the music
    sheet block. It was very amusing to watch and play with.

    Has anyone had any experience with these and knows how they work for
    certain?

    If you want to look it up, go here:

    http://www.mrchristmas.com/product.php?line=Gold&cat=7&product=346

    No, I am not afflicated with the product.

    Al

    PS: Oh, and why didn't I thing of that?
     
  2. Roger

    Roger Guest

    Could be RFID, but I could think of other techniques.


    I assume it was contactless. A simple relaxation oscillator can produce
    a wide range of frequencies easily detected by a uC using just a
    capacitor. The advantage of this technique is that the "contacts" need
    not be good, and may not even be exposed. Imagine an SMD capacitor
    placed over a square with plates that correpond to the solder pads at
    the end. Even if the contact area where covered by a thin film it would
    be possible to get a variable frequency.

    In the case of RFID, it could just be the simplest possible case, that
    is a resonant circuit where you simply measure the frequency at which
    the "arial" is most loaded, without actually modulating the carrier.
     
  3. krw

    krw Guest

    From the page below (damned top poster):

    "Using the newest technology (Radio Frequency Identification),
    Maestro Mouse can play 24 favorite Holiday tunes on his baby
    grand piano."
     
  4. On a sunny day (Sun, 31 Dec 2006 12:03:18 -0500) it happened krw
    Not cheap, 55$.
    http://homestore3.com/mrchristmas10.html
    Great object to test you RFID jammer / eraser :)
     
  5. D from BC

    D from BC Guest

    The other day, a friend came over for lunch and brought a gift
    she had
    received. It was a baby grand piano, about 1 foot long, that had
    a mouse
    dressed in holiday clothes playing it.

    OK, here's the good part. The tune it would play would be
    selected by a
    1/8th inch block a little larger than a large postage stamp.
    Each of the
    blocks she had looked like sheet music. On the front was printed
    the
    name of the musical piece.

    When you placed the block on the music stand, the mouse would
    play the
    piano with that music. At the beginning and at the end, the
    mouse would
    make comments.

    It seems to me that the piano is activated by an RFID tag in the
    music
    sheet block. It was very amusing to watch and play with.

    Has anyone had any experience with these and knows how they work
    for
    certain?

    If you want to look it up, go here:

    http://www.mrchristmas.com/product.php?line=Gold&cat=7&product=
    346

    No, I am not afflicated with the product.

    Al

    PS: Oh, and why didn't I thing of that?
    ..
    ------------
    "Imagination is better than knowledge." (Einstein)

    Maybe you need more knowledge on imagination :)

    D
     
  6. Al

    Al Guest

    No contacts that I could see.

    Al
     
  7. Al

    Al Guest

    Aside from security tags, this is the first instance I had knowingly
    come across an interesting application of RFID technology.

    The "sheet music" has to be almost touching the holder for the gadget to
    start working.

    I no longer have access to radiography or else I would have taken one of
    the "music sheets" and X-rayed it to see how it was configured. Anybody
    actually taken one apart? Since it isn't mine, I won't do it.

    Al
     
  8. krw

    krw Guest

    Anyone got a spectrum analyzer/antennas?
     
  9. Is it not 13.56 MHz? Short wave radio should do?
    (There are also 2.45GHz tags, works up to 7 meters, but I think not these).

    Just looked it up, it is 13.56 MHz with +-423kHz sidebands.
    A lot of bandwidth!
    So you should get a carrier at 13.137 and 13.983 MHz on the shortwave radio
    too :)
     
  10. joseph2k

    joseph2k Guest

    My estimate is that all that is in the tag is a song ID. All the rest is in
    the capacious and complex piano part.
     
  11. jasen

    jasen Guest

    probably, but there's room in a 64K mifare tag for a whole song...
    and probabnly enough room in a 4K tag.

    Bye.
    Jasen
     
  12. There were children's 'CD' players which had plastic 'CDs'. Clearly the disk
    merely coded the internal player and had no music.











    --
     
  13. Al

    Al Guest

    After the first "music sheet" is left in place and the music has
    completed, the toy will then play the others in random order. So the tag
    must only have an ID in it for that particular song.

    This has been a nice discussions. Thanks for all your inputs.

    Al
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-