[sdiy] First NCO

[paul.maddox.mail-list at synth.net]

Pete,

 you can do it using discrete parts (eprom, latchs and full adder), or
using a small micro (PIC/AVR), here's the basic principle ;-

http://www.ppg.synth.net/wave22/

Paul

> 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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