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DTMF — Parallax Forums

DTMF

ArchiverArchiver Posts: 46,084
edited 2004-07-05 04:04 in General Discussion
Hello,

I was wondering if anyone know of a way to decode DTMF Tones with
the basic stamp. The CM8880 Tone decoder is no longer available. I
was hoping this could be done without any external IC's but if anyone
knows of any way, it would be most helpful.

Thank you very much,
Travis

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-07-12 10:47
    At 06:52 AM 7/12/03 +0000, travis_gm wrote:
    >Hello,
    >
    > I was wondering if anyone know of a way to decode DTMF Tones with
    >the basic stamp. The CM8880 Tone decoder is no longer available. I
    >was hoping this could be done without any external IC's but if anyone
    >knows of any way, it would be most helpful.
    >
    >Thank you very much,
    > Travis

    Hi Travis -

    Zarlink (formerly Mitel Semiconductor) may have a unit which is compatible
    with the obsolete California Micro CM8880. Take a look here:
    http://products.zarlink.com/product_profiles/MT8880C.htm

    I've not used it, so I can't vouch for its compatibility. They offer a number
    of DTMF receivers, other than the one shown above. Go here and use the Product
    Search facility with "DTMF" as the search term:
    http://www.zarlink.com/

    Regards,

    Bruce Bates
  • ArchiverArchiver Posts: 46,084
    edited 2003-07-12 12:03
    www.bgmicro.com shows that they still have some ICS8870 dtmf tone
    decoder chips. You might give them a try if that one is suitable for you
    purposes.
    The ICS8870 is equivalent to the MT8870 decoder chips.

    Original Message
    From: Bruce Bates [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=6nNobHln8lh3PPLgV63ryJY7vKYjc6b_ZISLL_HDTIyib-oHdtawfrroRs4DU73HlCL3oIk0gpwgH-ZkpFU7oQ]bvbates@u...[/url
    Sent: Saturday, July 12, 2003 4:48 AM
    To: basicstamps@yahoogroups.com
    Subject: Re: [noparse][[/noparse]basicstamps] DTMF

    At 06:52 AM 7/12/03 +0000, travis_gm wrote:
    >Hello,
    >
    > I was wondering if anyone know of a way to decode DTMF Tones with
    >the basic stamp. The CM8880 Tone decoder is no longer available. I
    >was hoping this could be done without any external IC's but if anyone
    >knows of any way, it would be most helpful.
    >
    >Thank you very much,
    > Travis

    Hi Travis -

    Zarlink (formerly Mitel Semiconductor) may have a unit which is
    compatible
    with the obsolete California Micro CM8880. Take a look here:
    http://products.zarlink.com/product_profiles/MT8880C.htm

    I've not used it, so I can't vouch for its compatibility. They offer a
    number
    of DTMF receivers, other than the one shown above. Go here and use the
    Product
    Search facility with "DTMF" as the search term:
    http://www.zarlink.com/

    Regards,

    Bruce Bates


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  • ArchiverArchiver Posts: 46,084
    edited 2003-07-12 16:01
    HAVE YOU CHECKED WITH PARALLAX PARTS.

    I GOT MINE FROM THEM.

    IF THEY DON'T HAVE THEM NOW. THERE ARE OTHERS SUPPLIERS THAT WILL.

    IT IS A VERY COMMON PART.

    SPENCE


    Message: 20
    Date: Sat, 12 Jul 2003 06:52:09 -0000
    From: "travis_gm" <travis_m25@h...>
    Subject: DTMF

    Hello,

    I was wondering if anyone know of a way to decode DTMF Tones with
    the basic stamp. The CM8880 Tone decoder is no longer available. I
    was hoping this could be done without any external IC's but if anyone
    knows of any way, it would be most helpful.

    Thank you very much,
    Travis
  • ArchiverArchiver Posts: 46,084
    edited 2004-06-10 18:56
    I know the BS2 can send DTMF (DTMFOUT) signals but can it read or
    listen to them?

    Thanks,

    Chris
  • ArchiverArchiver Posts: 46,084
    edited 2004-06-10 21:08
    --- In basicstamps@yahoogroups.com, "christopher41877" <CHRIS@R...>
    wrote:
    > I know the BS2 can send DTMF (DTMFOUT) signals but can it read or
    > listen to them?
    >
    > Thanks,
    >
    > Chris


    Chris

    You'll need a separate DTMF decoder chip which actually
    interfaces quite easily with the stamp.

    If you're interested,contact me by e-mail off list and I'll dig it
    out of the archives.

    Tom Sisk
  • ArchiverArchiver Posts: 46,084
    edited 2004-07-05 04:02
    In the robot-builders bonanza book it says the Basic Stamp can be
    used to decode DTMF tones instead of a decoder circuit. Is this
    true? If so how?

    Thanks,
    Rob
  • ArchiverArchiver Posts: 46,084
    edited 2004-07-05 04:04
    No, it's not. The BASIC Stamp 2 family can generate DTMF tones, but
    decoding requires external hardware.

    Jon Williams
    Parallax

    Original Message
    From: mstroboto2003 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=GcBmXWmwK8yJN69ABQZ712fKNRlBCpa_c-OAqqTpAToyLX5zVGH29ENkvMxIZQWrqXYYXtYBB8U]monkeymack@a...[/url
    Sent: Sunday, July 04, 2004 10:03 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] DTMF


    In the robot-builders bonanza book it says the Basic Stamp can be
    used to decode DTMF tones instead of a decoder circuit. Is this
    true? If so how?

    Thanks,
    Rob
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