[sdiy] Reverse Sawtooth

Matthew Smith matt at smiffytech.com
Mon Jan 24 22:21:22 CET 2011


Quoth Ingo Debus at 25/01/11 03:31...
>> * strip the software to bare bones and time the system externally,  
>> using INT0.
> 
> Wouldn't this cause a lot of jitter?

I think that it would depend on the clock speed of the device being 
interrupted. There is obviously a certain window of time in which the 
interrupt has to be recognised - I would have thought that this would 
decrease with greater clock speeds. I'll be running the TINY2313s at 
12MHz in the first instance - that being the fastest crystals I have on 
hand, without trying overclocking.

But, as Harry points out (albeit jokingly,) how is this worse than a 
jittery analogue system for musical purposes. (As opposed to 
instrumentation grade signal generators or whatever.) After all, exactly 
how many analogue systems are actually in *tune* ;-)


-- 
Matthew Smith
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