[sdiy] New TOG board: $0.02 needed

[Tim Ressel]

Yes it will. The method I use is to implement a counter and use a comparator to compare the output of the counter to a constant. The comparator output is the note output. All I have to to to set *any* duty cycle is to change the constant and recompile.

--TimR


--- On Tue, 1/6/09, Ben Stuyts <ben at stuyts.nl> wrote:

> From: Ben Stuyts <ben at stuyts.nl>
> Subject: Re: [sdiy] New TOG board: $0.02 needed
> To: "Synth-Diy" <synth-diy at dropmix.xs4all.nl>
> Date: Tuesday, January 6, 2009, 4:13 PM
> Hi Tim,
> 
> On 6 jan 2009, at 20:37, Tim Ressel wrote:
> 
> > I have developed a TOG board using a CPLD to mimic the
> MK50240. Currently it has a crystal oscillator, level
> translators for 5V outputs from the 3.3V CPLD, connector for
> external clocking options, and a recently added 7-stage
> divider. Also a just intoned version is in the works. A
> simple programming change, he said wryly...
> > 
> > I need to spin the board one more time. Are there any
> other features you would like to see on the board? I have
> plans for add-in boards for VCO vibrato/pitch bend
> applications and possibly a PLL board for making odd clock
> frequencies. I don't want to burden this board with gobs
> of stuff, but little things like the divider make sense.
> > 
> > So if you want to put your 2 cents worth in do so
> today-ish. I'd like to get the board out tonight.
> 
> Would it also be possible to emulate the S50241? I believe
> the only difference is 30% vs 50% duty cycle outputs.
> 
> Ben
> 
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