[sdiy] 5V power supply for logic and uC

[Thomas Strathmann]

On 02.11.12 16:05, Barry Klein wrote:
> Oh, and on your modules - use proper bypassing techniques for your digital
> circuits.  This means you may have some low esr bulk capacitance at the
> supply input but also be sure to have high frequency suppression ceramics at
> the chips themselves.  Possibly add ferrite beads on chip VCC inputs too.

I'd be interested in reading up on these issues. I had a look at the
chapter on low noise techniques and the section on interfacing analog
circuitry to digital in Art of Electronics last night, but that did not
satisfy my curiosity. A good book or paper/application note
recommendation is very much appreciated.

> Another thing, if 5V is not normally supplied with commercial synth case
> systems it indicates you want local 5V sourcing off the 12V on each module.
> Otherwise, let's say your module works awesomely and you want to make and
> sell a bunch.  No 5V on your customer's system...

That's what I will do for the time being although I have no intentions
of manufacturing and selling modules. But it will certainly help keep
the paths that the digital supply current has to travel and that can't
be a bad thing methinks, but then again, I'm a computer scientist and
not an electrical engineer, Jim. ;-)

	Thomas