Post by thread:chime tone chip?

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_OUTharoldTakeThisOuThallikainen.com Hallikainen & Friends, Inc. See the FCC Rules at http://hallikainen.com/FccRules and comments filed in LPFM proceeding at http://hallikainen.com/lpfm ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

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.

On Tue, 2 Feb 1999 14:04:52 EST Darren Logan <.....DAZLOGANKILLspam@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 haroldKILLspamhallikainen.com Hallikainen & Friends, Inc. See the FCC Rules at http://hallikainen.com/FccRules and comments filed in LPFM proceeding at http://hallikainen.com/lpfm ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

On Tue, 2 Feb 1999 15:11:44 EST "Karl A. Uscroft" <.....KUscroftKILLspam.....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_OUTTakeThisOuThallikainen.com Hallikainen & Friends, Inc. See the FCC Rules at http://hallikainen.com/FccRules and comments filed in LPFM proceeding at http://hallikainen.com/lpfm ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]

| 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.

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 +---------------*----------------+ | Sean Breheny | | Amateur Radio Callsign: KA3YXM | | Electrical Engineering Student | +---------------*----------------+ Save lives, please look at http://www.all.org Personal page: http://www.people.cornell.edu/pages/shb7 shb7spam_OUTcornell.edu Phone(USA): (607) 253-0315 ICQ #: 3329174

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. -- Chip Technologies Microchip Design Consultant No. 70, 9th Main Road, Mathikere, Bangalore - 560 054. INDIA Tel : +91-80-3362807 Fax : +91-80-3369451 Email : @spam@chiptechKILLspamvsnl.com Webpage : http://business.vsnl.com/chiptech

> 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: KILLspamSteinarKILLspamneo.no Solheimsveien 62A Home E-Mail: RemoveMEStolsenTakeThisOuTc2i.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 =============================================================

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

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

Hey, I see you again you lost contact with me //Ross ---------- > From: Eric Borcherding <spamBeGoneBorcherdngspamBeGoneAOL.COM> > To: TakeThisOuTPICLISTEraseMEspam_OUTMITVMA.MIT.EDU > Subject: Re: chime tone chip? > Date: Wednesday, February 03, 1999 4:16 PM > > http://www.holtek.com

In message <RemoveME19990202.135822.3023.1.HaroldHallikainenTakeThisOuTjuno.com>, Harold Hallikainen <haroldhallikainenEraseME.....JUNO.COM> writes >On Tue, 2 Feb 1999 14:04:52 EST Darren Logan <EraseMEDAZLOGANAOL.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. /--------------------------------------------------------------\ | Nigel Goodwin | Internet : RemoveMEnigelgEraseMEEraseMElpilsley.demon.co.uk | | Lower Pilsley | Web Page : http://www.lpilsley.demon.co.uk | | Chesterfield | Official site for Shin Ki Ju Jitsu | | England | | \--------------------------------------------------------------/

> > 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_OUTKILLspamneo.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 =============================================================

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.

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}