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 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

On Sun, 22 Jul 2012, wrote:

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.

But you should never keep a meter on ohms or continuity. Because those
are vulnerable ranges. You turn it on and measure some voltage, and bang
you blew a fuse if you were lucky, you've damaged the meter if you weren't
lucky. Keep it on a voltage range, which can handle anything that would
come across the leads. Put it on a higher voltage range if you really
worry, though the meter should be protected for overvoltage.

Michael VE2BVW



When I tried it last, the buzzer buzzed twice then died.
Positive inside contact circle or outside ring ? Probably a standard