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Qv300 — Parallax Forums

Qv300

ArchiverArchiver Posts: 46,084
edited 2001-06-08 02:06 in General Discussion
Hi, has anyone used the new sound chip from parallax?

I hooked it up according to the example that came with the chip, and
it seems like the effort of driving my speaker is causing the chip to
restart. I'm using a 8 om, .25 w speaker, connected directly to the
speaker + and speaker - pins. I've hooked up the QV400 +5v pin
directly to the stamps vdd pin, could that be causing the problem?
does it need it's own power source?

If the speaker is connected, it will start the demo sequence then
restart after saying a couple of numbers. If the speaker isn't hooked
up it does fine (I can see the output continue in the debug window).

Incidentally, the demo program that comes on the floppy incorrectly
has the constant for ground set to pin 9, when it is in fact pin 8
according to the other documentation and the marking on the chip.

Thanks for any advice,

Mark

**********************************
Mark Allen
3293 Prospect Ave #C
Culver City, CA 90232
310 266 1046
markallen@m...

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-06-08 00:43
    You need to have a separate 5v supply with enough current to power the
    module. Jon Williams says they board has a 300 mw amp for the speaker. This
    translates to 60 ma, not including what the module draws.
    Original Message


    > Hi, has anyone used the new sound chip from parallax?
    >
    > I hooked it up according to the example that came with the chip, and
    > it seems like the effort of driving my speaker is causing the chip to
    > restart. I'm using a 8 om, .25 w speaker, connected directly to the
    > speaker + and speaker - pins. I've hooked up the QV400 +5v pin
    > directly to the stamps vdd pin, could that be causing the problem?
    > does it need it's own power source?
    >
    > If the speaker is connected, it will start the demo sequence then
    > restart after saying a couple of numbers. If the speaker isn't hooked
    > up it does fine (I can see the output continue in the debug window).
    >
    > Incidentally, the demo program that comes on the floppy incorrectly
    > has the constant for ground set to pin 9, when it is in fact pin 8
    > according to the other documentation and the marking on the chip.
  • ArchiverArchiver Posts: 46,084
    edited 2001-06-08 00:46
    [font=arial,helvetica]In a message dated 6/7/01 6:29:46 PM Central Daylight Time,
    markallen@markallen.com writes:


    Hi, has anyone used the new sound chip from parallax?

    I hooked it up according to the example that came with the chip, and
    it seems like the effort of driving my speaker is causing the chip to
    restart. I'm using a 8 om, .25 w speaker, connected directly to the
    speaker + and speaker - pins. I've hooked up the QV400 +5v pin
    directly to the stamps vdd pin, could that be causing the problem?
    does it need it's own power source?

    If the speaker is connected, it will start the demo sequence then
    restart after saying a couple of numbers. If the speaker isn't hooked
    up it does fine (I can see the output continue in the debug window).

    Incidentally, the demo program that comes on the floppy incorrectly
    has the constant for ground set to pin 9, when it is in fact pin 8
    according to the other documentation and the marking on the chip.



    The QV306M4 definitely needs its own power source -- the onboard amplifier is
    capable of driving 300 mW.

    Sorry for the error in the demo, it's being corrected. ·Luckily, the error
    was a typo (my fault) in the comments and not in the actual code. ·As you've
    seen, the QV306M4 is marked and shouldn't cause anyone a problem.

    -- Jon Williams
    -- Applications Engineer, Parallax
    -- Author of the QV306M4-P demo[/font]
  • ArchiverArchiver Posts: 46,084
    edited 2001-06-08 01:39
    DEAR MARK,
    I HAVE THREE UNITS UP AND RUNNING FINE AND USED THE DIAGRAM THAT WAS
    PROVIDED IN THE DOCUMENTATION. THE BOARDS HAVE THE SILK SCREEN OF THE
    CORRECT PINS. I THINK YOU ARE DRIVING THE OUTPUT AMP INTO SATURATION WITH
    THE SPEAKER YOU ARE USING. I USED A SMALL PM SPEAKER THE SIZE OF A QUARTER
    AND IT SOUNDS FINE WITH THE DEMO AND OTHER PHRASES. CHECK THE CONNECTIONS
    AND USE A SMALLER SPEAKER FIRST.
    MIKE MOCENTER
    Original Message
    From: markallen <markallen@m...>
    To: <basicstamps@yahoogroups.com>
    Sent: Thursday, June 07, 2001 7:26 PM
    Subject: [noparse][[/noparse]basicstamps] QV300


    > Hi, has anyone used the new sound chip from parallax?
    >
    > I hooked it up according to the example that came with the chip, and
    > it seems like the effort of driving my speaker is causing the chip to
    > restart. I'm using a 8 om, .25 w speaker, connected directly to the
    > speaker + and speaker - pins. I've hooked up the QV400 +5v pin
    > directly to the stamps vdd pin, could that be causing the problem?
    > does it need it's own power source?
    >
    > If the speaker is connected, it will start the demo sequence then
    > restart after saying a couple of numbers. If the speaker isn't hooked
    > up it does fine (I can see the output continue in the debug window).
    >
    > Incidentally, the demo program that comes on the floppy incorrectly
    > has the constant for ground set to pin 9, when it is in fact pin 8
    > according to the other documentation and the marking on the chip.
    >
    > Thanks for any advice,
    >
    > Mark
    >
    > **********************************
    > Mark Allen
    > 3293 Prospect Ave #C
    > Culver City, CA 90232
    > 310 266 1046
    > markallen@m...
    >
    > To UNSUBSCRIBE, just send mail to:
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    > from the same email address that you subscribed with. Text in the Subject
    and Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-06-08 02:06
    Power supply was the issue, thanks guys!

    It's a pretty cool product BTW


    >You need to have a separate 5v supply with enough current to power the
    >module. Jon Williams says they board has a 300 mw amp for the speaker. This
    >translates to 60 ma, not including what the module draws.
    >
    >
    Original Message
    >
    >
    > > Hi, has anyone used the new sound chip from parallax?
    > >
    > > I hooked it up according to the example that came with the chip, and
    > > it seems like the effort of driving my speaker is causing the chip to
    > > restart. I'm using a 8 om, .25 w speaker, connected directly to the
    > > speaker + and speaker - pins. I've hooked up the QV400 +5v pin
    > > directly to the stamps vdd pin, could that be causing the problem?
    > > does it need it's own power source?
    > >
    > > If the speaker is connected, it will start the demo sequence then
    > > restart after saying a couple of numbers. If the speaker isn't hooked
    > > up it does fine (I can see the output continue in the debug window).
    > >
    > > Incidentally, the demo program that comes on the floppy incorrectly
    > > has the constant for ground set to pin 9, when it is in fact pin 8
    > > according to the other documentation and the marking on the chip.
    >
    >
    >
    >
    >To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    >from the same email address that you subscribed with. Text in the
    >Subject and Body of the message will be ignored.
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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