Re: Controlling Holiday Lights

[sylvan butler <ZsdbUse1+noZs_0610@xxxxxxxxxxxxxxxxxxxxx>]

On Tue, 31 Oct 2006 12:03:01 -0500, Marc_F_Hult <MFHult@xxxxxxxxxxxxxxxxxxxxx> wrote:
><ZsdbUse1+noZs_0610@xxxxxxxxxxxxxxxxxxxxx> wrote in message
><slrnek5vme.vse.ZsdbUse1+noZs_0610@xxxxxxxxxxxxxxx>:
>>8x is 960/sec.
>>If I instead trigger at 1000/sec, that is a max of 4% error when it
>>happens at random instead of synchronized to zero crossings.
>
> ??? Where does 4% come from?

(1000-960)/1000 gives 4% error in frequency.  Or I thought it did...

> 0.4% (not 4%) relates to how close 960 is to 1000

It does?  Hmm.


Oh, I should clarify that right now I'm not frequency limiting to 1khz.
1khz is my lower bound on the design, not to be confused with "will
operate at 1khz" and definitely not an "up to 1khz" target.  The only
limits I have on output waveform right now are duty cycle of the output
and how often the processor can repeat the synth loop.

sdb

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