I am trying to drive a piezo speaker using a pic
and I want to amplify my output, or just make it
louder.

I am making a little tone generator for a tabletop
oven that will sound when the thing stops.  It has
a built in timer, but no bell to let you know the
thing has stopped.

So, using what amounts to the Freqout command from
a stamp, I generate my tone, but it isn't loud enough.

Can you make a little amplifier using a single 2n2222 transistor?

Any help appreciated.

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