[sdiy] wall warts--wishful thinking

[Harry Bissell Jr]

In a lot of applications it is no problem.

If there is a design weakness, the switcher may
cause trouble.

ex.  Some designers use the power supply rails to set
critical voltages like the reset level on a VCO

(they SHOULD use voltage references, na ?)

In this case... the HF 'fuzz' riding the supply can
cause erratic (jittery) reset, bizarre soft sync
problems etc.

Try it and find out !!!

H^) harry

--- "Dave Krooshof - dendriet.nl" <krooshof at gmail.com>
wrote:

> So how about stealing those ultra light switching
> powersupplies from
> laptops etc?
> I recently finished a 32 step analogue sequencer,
> and I feed it with a
> 24 volt power supply that I got from the dead
> computer storage in my
> school where I teach. It weighs next to nothing.
> With a few elco's and
> a 7812 I get a really steady 12 Volt DC. The
> sequencer is totally
> happy with it.
> But that is not a sound source... I have no
> experience in using those
> for sound oscillators.  Are there any disadvantages?
> 
> 
> -- 
> http://www.dendriet.nl
> 
>