Where to find a flat speaker the size of a quarter?

[radioted]

Does anyone know where I can find a flat tiny speaker, let's say for arguments sake roughly the size of a quarter, that can produce a reasonably loud audible tone?

Thanks!

Ted

 

[chroot]

You're looking for a piezo buzzer, I'd guess. Check with digikey or newark or any other electronics distributor.

- Warren

 

[xez]

Don't use a piezo disc or piezo buzzer unless you want
an audible *tone* i.e. something that's good at buzzing /
beeping at a given relatively fixed frequency.

If you want to reproduce a wide(r) range of audio frequencies through it as a speaker, you should get something that's sold as a speaker.

Check digikey.com, mouser.com, newark.com,
amasci.com,
http://www.goldmine-elec.com/
et. al.

You'll have a hard time finding something that's BOTH
the diameter of a quarter or so AND as flat as a quarter
that's good at being loud and acts as a good speaker
over the audio range. For full fledged speaker function,
look for something the thickness of 3 to 8 stacked quarters,
or something a bit bigger in diameter but thinner.

Check your local junk cell phone or small earphones or
headphones for cheap or free tiny speakers, though
the cellphone / headphone ones will tend to be a bit
thicker, and the earphone ones don't put out so much
audio power.

 

[xez]

Goldmine has a nice set:
http://www.goldmine-elec-products.com/products.asp?dept=1217

http://www.goldmine-elec-products.com/prodinfo.asp?number=G15776

http://www.goldmine-elec-products.com/prodinfo.asp?number=G14360

and several other nice models depending on your needs.

 

[robdoobie]

Try these speakers!

http://www.gloprop.com.au/?LinkServID=ABAD66B2-A461-9019-49655B731F5FBA4B&showMeta=0

 

[Mike_In_Plano]

Be sure to let your speakers "speak." Sealing them up in a box, like we often do peizo's, is enough. You'll end up with a product that can only be hear from 1-2 feet.
Speakers need an opening.

 

[Emreth]

you can buy those greeting cards that play music when you open them.they have buzzers the right size that sound ok.

 

[rataton]

In the Berlin of the 20th there was a competing "Blatthaller" Speaker with a parallel noise emission. New edited and brought to HiFi Quality. With a deepth of 20mm and a clear bass. Who is able to commercialise it. ? See also www.eysono.com

 

[davenn]

or failing all of the above

rat one out of a mobile phone, there's zillions of them out there no longer used
you probably have an old one in your drawer at home, I have a bunch of them

Dave