what is postive and negative on a round buzzer where contacs are an inside center circle and an outside ring ?

or does positive and negative matter with a piezo buzzer ?

On Sun, 22 Jul 2012 10:06:31 -0700 (PDT), wrote:


what is postive and negative on a round buzzer where contacs are an inside center circle and an outside ring ?

or does positive and negative matter with a piezo buzzer ?

No it doesn't matter. But it sounds like you just have a bare piezo
element, not the whole buzzer. What is driving it?

On Sun, 22 Jul 2012, somebody wrote:

On Sun, 22 Jul 2012 10:06:31 -0700 (PDT), wrote:


what is postive and negative on a round buzzer where contacs are an inside center circle and an outside ring ?

or does positive and negative matter with a piezo buzzer ?

No it doesn't matter. But it sounds like you just have a bare piezo
element, not the whole buzzer. What is driving it?

Huh?

If it's just the element, it probably doesn't matter. But if it's an
actual buzzer, of course polarity matters, since there's an active device
in there to make the sound, and it is polarity sensitive.

Michael VE2BVW

I suppose you are referring to the piezo element alone. In that case the answer is 'no polarity' as the element responds to an ac signal only.

I have a nice auto multimeter. The continuity buzzer's out so I wanted to test it, replace with a radio shack element.

The meter turned itsself on inside the snapbox. Apparemtly the contacs touched killing the buzzer or driver.

When I tried it last, the buzzer buzzed twice then died.

Positive inside contact circle or outside ring ? Probably a standard

OK, this is not the answer, but a little tale about piezo buzzers.

I got a new "stud finder" (for locating wall studs in a building). It
was superb! Got the job done. Three or
four years later, I had occasion to use it again. Worked fine, except the
"buzzer" didn't sound. Tore it down
and found the little devil piezo element. Located a similar Radio Shack
element, and replaced the original.
Still didn't work. SWMBO said "hope you get tired of playing with that noisy
thing"....... HUH?
Well, piezo worked just fine. Ears had aged embarrassingly.

Old Chief Lynn, W7LTQ

wrote in message
...

what is postive and negative on a round buzzer where contacs are an inside
center circle and an outside ring ?

or does positive and negative matter with a piezo buzzer ?

On Mon, 23 Jul 2012 04:13:21 +0000, vu2nan wrote:
;793804 Wrote:
what is postive and negative on a round buzzer where contacs are an
inside center circle and an outside ring ?

or does positive and negative matter with a piezo buzzer ?

I suppose you are referring to the piezo element alone. In that case the
answer is 'no polarity' as the element responds to an ac signal only.

.... or pulsed DC.

Correct! Pulsed DC too!

On Sunday, July 22, 2012 9:13:21 PM UTC-7, vu2nan wrote:
;793804 Wrote:
> what is postive and negative on a round buzzer where contacs are an
> inside center circle and an outside ring ?
>
> or does positive and negative matter with a piezo buzzer ?

I suppose you are referring to the piezo element alone. In that case the
answer is 'no polarity' as the element responds to an ac signal only.




--
vu2nan

there's an inverter inside my multimeter ? why are peizo buzzers listed in Radio Shack under DC voltages ?

for Ears, H202...

I lost a Wal Multimeter, giving a negative rating, when packing for a Xrosscountry trip. The meter was packed deep. It began screaming on Texas 1016 (?). bing bong bing....and down there it died.

The silent one now is an Acton from Summit Racing. It needs revival. I hope the buzzers dead so the prebuzz circuit remains alive.