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Re: Quad phased output LFO

2003-09-05 by strohs56k

--- In motm@yahoogroups.com, "paulhaneberg" <phaneber@o...> wrote:
> I'd like to have one of these myself and I plan to build one if Paul 
> or someone else doesn't first :)
> My plan is to use a wave table and some counters.  You'd shift the 
> phase by adding or subtracting from the counter [...]

If the intent is LFO, it seems like it might be easier to do this with 
a microcontroller like a PIC or something.  You need to write some 
code but you gain flexibility and the electronics (basically the MCU 
and maybe a couple of serial DACs) will be less involved compared with 
a bunch of counters and associated logic.

And what you really want - have a few digits of 7 segment displays to 
show the selected phase separation and make it continuously variable 
in 1 degree steps.  Maybe have 8 outputs that are selectable - so you 
could choose 8 phases of one waveform or 2 sets (4 phases of two 
different waveforms) or 4 sets (2 phases of 4 waveforms) - something 
like that.


seth

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