Have a look at http://www.al-williams.com/pak5.htm -- a lot of these are
used in commercial lighting displays.

Other than that, you might consider writing your own PWM in an interrupt
timer routine. However, 30 might be a bit much depending on the
frequency you want.

Regards,

Al Williams
AWC
* Easy RS-232 Prototyping
http://www.al-williams.com/awce/rs1.htm

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Josh Koffman
> Sent: Thursday, November 14, 2002 4:47 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]: Many channels of PWM
>
>
> Hi all. I seem to be in a creative mood lately. I came up
> with an odd idea for a festive holiday light type item.
> Problem is I want 15-30 channels of PWM. I really like the
> PIC's PWM module for its simplicity. However, 15 16f628s or 8
> 16f870s seems a bit much. I have seen Scott Dattalo's code
> for 8 concurrent streams. However it's all software, and I'm
> worried that running a routine for dealing with serial comms
> will throw off the timing. Is there a commercially available
> chip that does multiple PWMs in one package? Or, has anyone
> else dealt with this?
>
> Thanks,
> Josh
>
> --
> A common mistake that people make when trying to design
> something completely foolproof is to underestimate the
> ingenuity of complete fools.
>         -Douglas Adams
>
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