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PICList Thread
'chime tone chip?'
1999\02\02@133336 by Harold Hallikainen

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       Anyone have any ideas of a supplier and part number for a chip
that would make a nice chime tone (perhaps like that used in cars to tell
you your seat belt is not fastened)?  The chip, of course, would be
driven by a PIC!

Thanks!

Harold



Harold Hallikainen
spam_OUTharoldTakeThisOuTspamhallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm

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1999\02\02@134755 by dave vanhorn

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At 01:31 PM 2/2/99 -0500, Harold Hallikainen wrote:
>        Anyone have any ideas of a supplier and part number for a chip
>that would make a nice chime tone (perhaps like that used in cars to tell
>you your seat belt is not fastened)?  The chip, of course, would be
>driven by a PIC!


This sounds like something Holtek would make.

1999\02\02@140650 by Darren Logan

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Look in Maplin catalogue. They usually have stuff  like that.

1999\02\02@152311 by Karl A. Uscroft

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Try the HT2860B and the HT82207 & HT82231 sound generators,  loads of sounds
bells etc

1999\02\02@152912 by Harrison Cooper
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Square wave generator...do it in a PIC, or a 555.  Course, not much
amplitude.

1999\02\02@165700 by Harold Hallikainen

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On Tue, 2 Feb 1999 14:04:52 EST Darren Logan <.....DAZLOGANKILLspamspam@spam@AOL.COM> writes:
>Look in Maplin catalogue. They usually have stuff  like that.
>


       I don't have their catalog, and http://www.maplin.com seems to return an
empty page.


Harold


Harold Hallikainen
haroldspamKILLspamhallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm

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1999\02\02@165708 by Harold Hallikainen

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On Tue, 2 Feb 1999 15:11:44 EST "Karl A. Uscroft" <.....KUscroftKILLspamspam.....AOL.COM>
writes:
>Try the HT2860B and the HT82207 & HT82231 sound generators,  loads of
>sounds
>bells etc
>

       Looking at the Holtek web site, it looks like the HT2860B is
custom programmed for different sounds.  The other two parts do not show
up on their site.  Is there a part that is for sure a reasonable chime
sound that someone has in stock in the US?

Thanks!

Harold



Harold Hallikainen
EraseMEharoldspam_OUTspamTakeThisOuThallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm

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1999\02\02@175426 by John Payson

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|        Anyone have any ideas of a supplier and part number for a chip
|that would make a nice chime tone (perhaps like that used in cars to tell
|you your seat belt is not fastened)?  The chip, of course, would be
|driven by a PIC!

How about having the PIC produce the tone itself?  There
are a couple of tricks that may make this work more nicely:

[1] Trying to drive an 8 ohm speaker directly with a PIC is
   going to be a losing proposition.  A piezo, however, should
   pose no problem.  If you're only producing one tone at a
   time, a piezo should probably be adequate.  Alternatively,
   an emitter-follower may be used with an 8 ohm speaker.

[2] The "decay" may be produced by adjusting the wave shape of
   your audio output, by superimposing a higher-speed PWM, by
   use of a "resistor DAC", or by using a capacitor in the
   speaker's "power suppmy" [if you're using an emitter follower,
   e.g.].

[3] The hardware PWM on certain PICs may be handy if it is avail-
   able.

If your PIC has too much else to do, it may not be possible to make
the chime directly.  But if it's possible it may be the simplest
way to go.

1999\02\02@184729 by Sean Breheny

face picon face
At 04:55 PM 2/2/99 -0600, you wrote:
>If your PIC has too much else to do, it may not be possible to make
>the chime directly.  But if it's possible it may be the simplest
>way to go.
>

I don't know much about piezo's but in a previous discussion, someone
stated that a piezo has such high Q that pulsing it from a PIC could make
it ring audibly. Possibly, it would be enough to just excite it with a
pulse every few 100ms?

Otherwise, there are very simple circuits for oscillators that consist of
one transistor, a couple of resistors and caps, and a piezo disc(piezo disc
acts as tuned circuit). I know several people on the list have at least
mentioned this, if not posted it before.

Sean

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1999\02\02@223004 by Ravi Pailoor

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With a 555, over a period of time, the caps will drift and the IR will
not work. I used a 12C508 to generate the 36KHz modulating freq.

Pailoor

Harrison Cooper wrote:

> Square wave generator...do it in a PIC, or a 555.  Course, not much
> amplitude.



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1999\02\03@030020 by Steinar Olsen

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>        Anyone have any ideas of a supplier and part number for a chip
>that would make a nice chime tone (perhaps like that used in cars to tell
>you your seat belt is not fastened)?  The chip, of course, would be
>driven by a PIC!

A long time ago there was tree small cheap chips SAB0600, SAB0601 and SAB0602
that did this. The "information ding-dong" at airports callings etc. often
came from these. See if you can find them anywhere :)

Good luck.



Steinar Olsen
Electronics Engineer
_____________________________________________________________
Norsk Elektro Optikk A/S        Work E-Mail:  KILLspamSteinarKILLspamspamneo.no
Solheimsveien 62A               Home E-Mail:  RemoveMEStolsenTakeThisOuTspamc2i.net
P.O. Box 384                    Direct:       +47 67 91 11 58
N-1471 SKAARER                  Phone:        +47 67 97 47 00
NORWAY                          Telefax:      +47 67 97 49 00
=============================================================

1999\02\03@043809 by Mark Willis

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Two ways to drive a Piezo or a speaker from a PIC, folks;

 1 pin - single ended (Other side of the speaker to Vcc or to Ground.)
 .and.
 2 pin - differential (pull pin1 low, pin2 high, or vice versa, gives
you twice the voltage swing - +- Vcc as opposed to half that.)

 The latter does take 2 pins (You can figure out a transistor or gate
buffer if IO pins are scarce, though <G>)

 Mark

1999\02\03@051206 by wwl

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On Tue, 2 Feb 1999 13:31:55 EST, you wrote:

>        Anyone have any ideas of a supplier and part number for a chip
>that would make a nice chime tone (perhaps like that used in cars to tell
>you your seat belt is not fastened)?  The chip, of course, would be
>driven by a PIC!
>
>Thanks!
>
>Harold
>
Siemens do one which does a 1,2 or 3-tone 'chime', with a proper
analogue output (not squarewave) part no. SAE800

1999\02\03@192537 by Eric Borcherding

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www.holtek.com

1999\02\03@214255 by H. Ross

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Hey,

I see you again you lost contact with me
//Ross

----------
> From: Eric Borcherding <spamBeGoneBorcherdngspamBeGonespamAOL.COM>
> To: TakeThisOuTPICLISTEraseMEspamspam_OUTMITVMA.MIT.EDU
> Subject: Re: chime tone chip?
> Date: Wednesday, February 03, 1999 4:16 PM
>
> http://www.holtek.com

1999\02\04@021839 by Nigel Goodwin

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In message <RemoveME19990202.135822.3023.1.HaroldHallikainenspamTakeThisOuTjuno.com>, Harold
Hallikainen <haroldhallikainenEraseMEspam.....JUNO.COM> writes
>On Tue, 2 Feb 1999 14:04:52 EST Darren Logan <EraseMEDAZLOGANspamAOL.COM> writes:
>>Look in Maplin catalogue. They usually have stuff  like that.
>>
>
>
>        I don't have their catalog, and http://www.maplin.com seems to return an
>empty page.

That's probably because the URL is 'http://www.maplin.co.uk' :-).
--

Nigel.

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1999\02\04@023113 by Steinar Olsen

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>
>        Anyone have any ideas of a supplier and part number for a chip
>that would make a nice chime tone (perhaps like that used in cars to tell
>you your seat belt is not fastened)?  The chip, of course, would be
>driven by a PIC!

Check out if SAB0600, SAB0601 and SAB0602 are still around.
These was ment for electronic doorbells etc. Also the "information
ding-dong" at  airports and other public caling systems were made from one
of these.

Good luck.



Steinar Olsen
Electronics Engineer
_____________________________________________________________
Norsk Elektro Optikk A/S        Work E-Mail:  RemoveMESteinarspam_OUTspamKILLspamneo.no
Solheimsveien 62A               Home E-Mail:  RemoveMEStolsenTakeThisOuTspamspamc2i.net
P.O. Box 384                    Direct:       +47 67 91 11 58
N-1471 SKAARER                  Phone:        +47 67 97 47 00
NORWAY                          Telefax:      +47 67 97 49 00
=============================================================

1999\02\04@072147 by paulb

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Mike Harrison wrote:

> Siemens do one which does a 1,2 or 3-tone 'chime', with a proper
> analogue output (not squarewave) part no. SAE800

 Give me a clue.  I tried to find a datasheet on the Siemens/Matsushita
site the other day and it was *useless*.  Do you (or anyone else) know
if they have a site for engineers to obtain information such as
datasheets, not just advertising?
--
 Cheers,
       Paul B.

1999\02\06@174033 by Alan Vogel

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Try using a piezo transducer with an oscillator built in (Radio Shack, ugh!,
even has one).  These things work from about 3 to 12 Volts.  Put about a
47uF cap across the piezo.  Then drive it from an I/O pin.  If you switch
the pin back and forth between output high and input then you get a nice
chime.  Try different duty cycles to get the best effect.  I've tried this
before and it sounds very similar to a car chime.

Alan

{Original Message removed}

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