On Saturday, October 08, 2011 1:25 PM, "Peter Johansson"  wrote:

> Class D really does seem to be the way to go in this application since
> quiescent current will be practically zero (in the dead-time between
> sounds) in addition to providing good efficiency when actually driving
> the speaker.

It will have a significant "pop" when you engage it. Alternatively you
could ramp up to 50% duty cycle.

I'm interested to hear how it turns out! No pun intended :)

In the beginning I'd suggest a pullup resistor rather than an inductor,
so you won't have any worries about what happens if it runs unloaded.

Cheerful regards,

Bob

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