> A darlington would suit better due to the
> amplification characteristics. amplifying the current
> of the output pin from a pic to drive the speaker.

Try this -

AB21A

Single Transistor 3V Speaker Driver for the ISD4000 Series

This brief illustrates a simple single transistor amplifier that can drive a
speaker

http://www.winbond-usa.com/mambo/content/view/155/285/



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