Making a bell sound cheaply.

Discussion in 'General Electronics Chat' started by Wendy, Apr 29, 2015.

  1. Wendy

    Thread Starter Moderator

    Mar 24, 2008
    20,766
    2,536
    M8021-2 IC

    This is a simple chip that will generate a bell sound. I tried Google, it shows lot of circuits using this chip, but no vendors. Anyone know sources for this part?

    I am also interested in other cheap circuits to generate a simple bell tone. I know sonalert has a series that does it, but I would rather not spend the $14 I saw quoted.
     
  2. Wendy

    Thread Starter Moderator

    Mar 24, 2008
    20,766
    2,536
    OK, second try. Evidently the chip I named is pretty close to unobtanium. Rather than start a second thread I've renamed this one.

    Does anyone have another idea, such a op amp circuit or other?

    Just trying not to reinvent the wheel.
     
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,546
    1,252
    A piezo beeper - not the bare piezo sounder disc that requires a drive waveform, but a complete beeper that needs only DC volts for power - can come close. It you put about 100 uF across the power terminals, and then hit them with 100 ms of +12V through a diode, the beeper tone decays exponentially like a bell. There are no harmonics to give a true bell sound, and the pitch changes slightly toward the end of the ding, but the acoustic envelope is there for next to nothing. I whipped this up about 20 years ago for an ambulance company. About 10 years after that I bought a new clothes dryer, and the "I'm finished" chime has the exact same sound.

    ak
     
    atferrari likes this.
  4. Nykolas

    Member

    Aug 27, 2013
    87
    31
    Google SAB0600. This obsolete Siemens IC is still available on ebay nand comes in 1, 2 and 3 chime tones. Also google chime tone generator circuit. E
     
  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,576
    231
    What would the supply voltage to the chime be? What triggers the chime...voltage...period? Could be as simple as a Radio Shack buzzer (electronic, not electromechanical) and an electrolytic capacitor.

    Ken
     
  6. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    $12.99 on eBay:

    [​IMG]

    :D
     
    Sinus23, cmartinez and #12 like this.
  7. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    There was a fad for melody chips during the 80s - these days you have to trawl through the poorly translated/printed component brochures coming out of China itself.

    Hobby electronics is very much up and coming in India, their domestic magazine is; Electronics For You - these types of chip are more in evidence there than in present day Western publications.
     
  8. Wendy

    Thread Starter Moderator

    Mar 24, 2008
    20,766
    2,536
    I'll try the capacitor across the piezo buzzer idea. It sounds interesting.

    Might even work for a 555 circuit.
     
  9. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
  10. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
    1,988
    Do you need just one or is this a batch operation?
     
  11. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,650
    765
    IIRC when I tested the SAB0600 it was a rather bass-sound gong. More than 30 years ago.
     
  12. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,070
    3,841
  13. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,576
    231
    Bill,
    It worked best with the Sonalert tone sounders. It varies a lot with the type of sounder and capacitance. I use a 555 for a pulse generator.

    Ken
     
  14. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
    1,988
    You can get one of those wireless door bells for less than the chips referenced so far.

    http://www.ebay.com/itm/LED-Wireles...224?pt=LH_DefaultDomain_0&hash=item418baf98f8


    http://www.amazon.com/gp/aw/d/B003E...-10&pi=AC_SX110_SY165_QL70&keywords=door+bell

    Just a couple of examples. You might even find cheaper.

    Bonuses:
    10 or more different chimes.
    Free RF actuator circuit with purchase of already 1/2-1/3 priced chip.
    Free shipping.
    If you change your mind about tearing it apart, you can always just default to using it as a doorbell. One can never have too many doorbells. I have one on every door of my house, even the interior ones (even the guest bathroom (even on the indside wall of the guest bathroom)).
     
  15. strantor

    AAC Fanatic!

    Oct 3, 2010
    4,302
    1,988
    No, it's the home of a sarcastic asshat.
     
    Sinus23 likes this.
  16. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    What have you got against JWs?
     
  17. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,070
    3,841
    Nothing against them. I just thought they would need to learn doorbell ringing somewhere.
     
  18. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    So you are implying they are both annoying *and* dumb?
     
  19. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,070
    3,841
    Implying is not something I do.
     
  20. joeyd999

    AAC Fanatic!

    Jun 6, 2011
    2,692
    2,756
    Maybe not conciously...
     
Loading...