Use a single transistor - works great for me, lots of noise. PIC output
to base via 1k resistor, emitter to ground, collector to speaker, other
speaker lead to Vcc.

Fred.


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of John Mullan
> Sent: Wednesday, December 08, 1999 3:40 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Making Sound!
>
>
> You should try using a piezo element instead of speaker (and
> maybe even
> leave out the cap).  You should get loud sound out of that.
>
> Just a thought
>
> John Mullan
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Mike M
> Sent: Tuesday, December 07, 1999 11:01 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Making Sound!
>
>
> Hey i been trying to create sound with a Pic and a speaker.
> Just using
> simple statements like
>
> BSF PORTB, 3
> ;;;delay 1ms
> call delay
> BCF PORTB, 3
>
> well it works, but really really low sound.  I expected that.
>  The speaker
> is 8ohm, one lead to ground, and the other lead to a 22uf cap
> wit the pos
> side to the PIC pin 3.  Now i got the basic idea from
> Dontronics pic source
> book.  Wich is almost taken right out of the BASIC STAMP 1
> manual except for
> the actual code :).   I would assume this setup on a stamp would also
> produce very low sound without some sort of amplifier or am i
> wrong? if so,
> why?
>
> Mike
>
> Send someone a cool Dynamitemail flashcard greeting!! And get
> rewarded.
> GO AHEAD! http://cards.dynamitemail.com/index.php3?rid=fc-41
>































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