[sdiy] First NCO

[Veronica Merryfield]

Pete

Whilst not exactly what you are looking for, the material surrounding the
Synergy, an all discrete (well logic chip) digital synth from the 80's will
give you lots of leads.  Background material and schematics at 
http://users.ece.gatech.edu/~lanterma/synergy/.


----- Original Message ----- 
From: Peter Keller
To: synth-diy at dropmix.xs4all.nl
Sent: Thursday, January 10, 2008 1:11 PM
Subject: [sdiy] First NCO


Hello,

I think I might have just enough skill (both soldering and mathematical)
to assemble a computer controlled numerically controlled oscillator. I'd
like to build it from scratch using ICs and passive components. I've seen
a lot of things on the net about it, but, for a first timer, where would
be the best place to start? I was thinking of using some direct digital
synthesis chip and PIC microcontrollers. Any advice? I'm looking to build
a one channel frequency synthesizer that is as linear as I am able to make
it from .1Hz to 30Khz. The filters (beyond those for cleaning up a signal)
and stuff I'll figure out later, I'd just like a sine wave out for now.

The end goal for why I'm doing this is not to just build PAIA kits or
something, but to have a deep and fundamental understanding of the theory
of why what I'm building works.

Thank you.

-pete
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