[XCSSA] Power Supplies Continued

[X-otic Computer Systems of San Antonio]

On Dec 28, 2008, at 7:05 AM, X-otic Computer Systems of San Antonio  
wrote:

>
> Good enough going linear, I've done it both ways, you might consider  
> the
> 7805ACT & 7809ACT regulators, the " ACT " provides 2% ouptput
> regulation vice 4% for the "T" suffix.

Ah I'll have to look into those, thanks!

>
>
> I've sucessfully used swithcher supplies for both my XM satellite  
> reciever and
> my low power FM transmitters, however, ampliying low level inputs  
> would be
> more susceptable.  Switcher noise is generated in its'oscillator  
> portion,
> however, if the mfgr used proper filtering, it usually smooths it out.

Ah yeah that could be a problem. The SIDs output does tend to be quite  
soft unamplified. You're right, though, "proper" switching supplies  
should filter that out. I could probably do the same with enough caps :)

> I'd fuse the Vcc inputs right where they enter your printed circuit  
> board.

That's what I was thinking, because then it's right after the power  
supply but before everything else.

Thanks Lou!