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Connecting a speaker to BS1 — Parallax Forums

Connecting a speaker to BS1

ArchiverArchiver Posts: 46,084
edited 2003-12-03 13:30 in General Discussion
Hi,

I would like to know the best way to connect a 2"
8 ohm speaker to one of the pins on a BS1.

I have tried a 10mf capacitor in series with the speaker and got fair
results. Volume was a bit low.
Is there a better way or a different value cap.

I have seen pull up or pull down resistors being used, which I tried, but
didn't seem to make any difference.

Also, I could use a pizeo speaker, but I would like to get information on
what type and hook-up information.

TIA and happy hollidays.
Tom

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-12-02 16:11
    It's been a while since I've connect a standard speaker, but I do
    remember that a higher-impedance speaker will give you better results.
    Better than that, run the output through a simple filter and into an
    amplifier (see SOUND in the help file or documentation for more
    information on this).

    -- Jon Williams
    -- Applications Engineer, Parallax
    -- Dallas Office

    Original Message
    From: Thomas R. Scheibl [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=io-vDITZJrRlIrZ9mTnWihyhilZukIQ7FROzKyvBRfhmTxg2Pqmok6pyT771BkmR8_qRfR2KP0XSmA]scheibl@p...[/url
    Sent: Tuesday, December 02, 2003 10:02 AM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1


    Hi,

    I would like to know the best way to connect a 2"
    8 ohm speaker to one of the pins on a BS1.

    I have tried a 10mf capacitor in series with the speaker and got fair
    results. Volume was a bit low. Is there a better way or a different
    value cap.

    I have seen pull up or pull down resistors being used, which I tried,
    but didn't seem to make any difference.

    Also, I could use a pizeo speaker, but I would like to get information
    on what type and hook-up information.

    TIA and happy hollidays.
    Tom


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  • ArchiverArchiver Posts: 46,084
    edited 2003-12-02 16:13
    Hi Tom,

    I have achieved good results using an 8 ohm speaker in series with a 33 ohm
    resistor. Connect two 10uF capacitors in series from your Stamp pin to
    ground and then connect one side of your speaker / resistor pair to the
    midpoint between the two capacitors and the other side to ground. The
    capacitor on the ground side is optional, but it does reduce high frequency
    noise.

    I hope this helps.

    Best regards,

    Russell Warburton
    email: russell@w...
    website: http://www.warburtech.com
    telephone: +44 (0)7814 044 754
    Original Message
    From: "Thomas R. Scheibl" <scheibl@p...>
    To: <basicstamps@yahoogroups.com>
    Sent: Tuesday, December 02, 2003 4:01 PM
    Subject: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1


    > Hi,
    >
    > I would like to know the best way to connect a 2"
    > 8 ohm speaker to one of the pins on a BS1.
    >
    > I have tried a 10mf capacitor in series with the speaker and got fair
    > results. Volume was a bit low.
    > Is there a better way or a different value cap.
    >
    > I have seen pull up or pull down resistors being used, which I tried, but
    > didn't seem to make any difference.
    >
    > Also, I could use a pizeo speaker, but I would like to get information on
    > what type and hook-up information.
    >
    > TIA and happy hollidays.
    > Tom
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. 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 2003-12-02 16:15
    Responding to my own response ... the manual states a 40 ohm or higher
    impedance speaker. Not always easy to find, so the amplifier trick may
    be best for good volume Even a simple LM386-based amp (like on our
    Audio Amp AppMod) will do.

    -- Jon Williams
    -- Parallax

    Original Message
    From: Jon Williams
    Sent: Tuesday, December 02, 2003 10:12 AM
    To: basicstamps@yahoogroups.com
    Subject: RE: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1


    It's been a while since I've connect a standard speaker, but I do
    remember that a higher-impedance speaker will give you better results.
    Better than that, run the output through a simple filter and into an
    amplifier (see SOUND in the help file or documentation for more
    information on this).

    -- Jon Williams
    -- Applications Engineer, Parallax
    -- Dallas Office

    Original Message
    From: Thomas R. Scheibl [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=asV5rGHxlOvhQZNvzHMC4dc_mwIIPYpVvK8XJKXgN7jsq7MDfn-unKvAK9TzkoXMlj0DrZoSt20NOEv6nw]scheibl@p...[/url
    Sent: Tuesday, December 02, 2003 10:02 AM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1


    Hi,

    I would like to know the best way to connect a 2"
    8 ohm speaker to one of the pins on a BS1.

    I have tried a 10mf capacitor in series with the speaker and got fair
    results. Volume was a bit low. Is there a better way or a different
    value cap.

    I have seen pull up or pull down resistors being used, which I tried,
    but didn't seem to make any difference.

    Also, I could use a pizeo speaker, but I would like to get information
    on what type and hook-up information.

    TIA and happy hollidays.
    Tom


    To UNSUBSCRIBE, just send mail to:
    basicstamps-unsubscribe@yahoogroups.com
    from the same email address that you subscribed. Text in the Subject
    and Body of the message will be ignored.


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    http://docs.yahoo.com/info/terms/




    This message has been scanned by WebShield. Please report SPAM to
    abuse@p....


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  • ArchiverArchiver Posts: 46,084
    edited 2003-12-03 13:30
    Hi,

    Thanks for yours and Jon's reply. I will try them out this weekend.

    Best regards,
    Tom
    Original Message
    From: "Russell Warburton" <russell@w...>
    To: <basicstamps@yahoogroups.com>
    Sent: Tuesday, December 02, 2003 10:13 AM
    Subject: Re: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1


    > Hi Tom,
    >
    > I have achieved good results using an 8 ohm speaker in series with a 33
    ohm
    > resistor. Connect two 10uF capacitors in series from your Stamp pin to
    > ground and then connect one side of your speaker / resistor pair to the
    > midpoint between the two capacitors and the other side to ground. The
    > capacitor on the ground side is optional, but it does reduce high
    frequency
    > noise.
    >
    > I hope this helps.
    >
    > Best regards,
    >
    > Russell Warburton
    > email: russell@w...
    > website: http://www.warburtech.com
    > telephone: +44 (0)7814 044 754
    >
    Original Message
    > From: "Thomas R. Scheibl" <scheibl@p...>
    > To: <basicstamps@yahoogroups.com>
    > Sent: Tuesday, December 02, 2003 4:01 PM
    > Subject: [noparse][[/noparse]basicstamps] Connecting a speaker to BS1
    >
    >
    > > Hi,
    > >
    > > I would like to know the best way to connect a 2"
    > > 8 ohm speaker to one of the pins on a BS1.
    > >
    > > I have tried a 10mf capacitor in series with the speaker and got fair
    > > results. Volume was a bit low.
    > > Is there a better way or a different value cap.
    > >
    > > I have seen pull up or pull down resistors being used, which I tried,
    but
    > > didn't seem to make any difference.
    > >
    > > Also, I could use a pizeo speaker, but I would like to get information
    on
    > > what type and hook-up information.
    > >
    > > TIA and happy hollidays.
    > > Tom
    > >
    > >
    > > To UNSUBSCRIBE, just send mail to:
    > > basicstamps-unsubscribe@yahoogroups.com
    > > from the same email address that you subscribed. 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/
    > >
    > >
    > >
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. 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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