[sdiy] First NCO

[Peter Keller]

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