negative voltage regulator

[birt]

if i put a negative voltage regulator right after the dc input on my fuzzface i can use it on the same power supply as negative ground effects right? because the +9V and -9V are still referenced to the same 0V ground connection. or am i missing something here?

[Peter Snowberg]

Yes, a -9V regulator can be used to supply clean power to all your positive ground effects. Of course you need a -DC source too, but a center tapped transformer is an easy way to get that along with your positive supply.

Here's an example for 15V use:
http://www.epanorama.net/counter.php?url=http://www.psyber.com/~dibsed/CIRCATS/opamp-ps.pdf

[Dragonfly]

cool little chip....lots of uses...voltage step up, +/-, etc....

MAX1044

AC

[birt]

what i meant is could i put a negative voltage regulator on the DC input of any pedal thats positive ground and then use it together with negative ground effects on a normal 5x9V dc power supply.

[R.G.]

what i meant is could i put a negative voltage regulator on the DC input of any pedal thats positive ground and then use it together with negative ground effects on a normal 5x9V dc power supply.

No, you can't. The original unregulated ("raw") DC supply still has its - side connected to ground. A negative regulator does not change that. You need an additional raw voltage with its + side grounded to the same ground as the positive raw supply. Then a negative-side regulator will make -9V for you and not give you the shorted ground problem.

Go read "Power Supplies Basics" (http://geofex.com/Article_Folders/Power-supplies/powersup.htm) for more on this.

In fact, reading all of the teaching articles at GEO is a good idea.

[birt]

what i meant is could i put a negative voltage regulator on the DC input of any pedal thats positive ground and then use it together with negative ground effects on a normal 5x9V dc power supply.

No, you can't. The original unregulated ("raw") DC supply still has its - side connected to ground. A negative regulator does not change that. You need an additional raw voltage with its + side grounded to the same ground as the positive raw supply. Then a negative-side regulator will make -9V for you and not give you the shorted ground problem.

Go read "Power Supplies Basics" (http://geofex.com/Article_Folders/Power-supplies/powersup.htm) for more on this.

In fact, reading all of the teaching articles at GEO is a good idea.

i've read it, and a lot of the other artocles on your site
but i didn't quite get this so i opened up this topic. i guess it's me and my slow brain :p