In message <PICLIST%96052104013521@MITVMA.MIT.EDU> you recently said:

> I'm still in the 'prototype' stage of building a PIC based alarm system
> (nothing too grand, using the 16C84) and I toggle one output pin to create
> the sound tones which (for now) feed a piezo buzzer (I guess standard stuff
> so far).
> The volume isn't great (and I don't want to drive it in 'bridge' mode), hence
> I need some amplification which will feed a reasonable-sized speaker
> (not quite mega-loud, but an 8ohm 8watt speaker which is kicking around in
> my workshop). I've had a quick trawl through old Electronics magazines and
> it looks like using a TDA2030 device might be my best bet.
> Can I solicit any ideas/opinions on my plan please?
>
> Whilst this solution will do for now (like, bigger problems to tackle
> first), ultimately I would like to investigate producing 'gentle' (for lack
> of a better word!) 'chime' sounds rather than pushing a square wave through
> an amp. Anyone done this already?
>
> Thanks in Advance
>
> Mungo Henning
>
AN543 in the microchip embedded control handbook shows how to
generate tones, unfortunately it is for the 17c42 but it may
be some help.



--
Paul Waterfield
TECHNIQUEST Exhibit Developer
paul@tquest.demon.co.uk