Originally Posted by

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 ?