bipolar power supply with two wall warts

[petey twofinger]

center stage reverb circuit calls for + -9 volts P.S. 

would i be able to simply use two 9 volt wall warts ?


tldr part below :

it may save me a bit of a hassle / headache , if it were to work and be quiet .

i tried this before with a paiaa ring mod , it is a bit noisy but i am not sure if this is the cause . i realize i should just hook it up and see but ... i was hoping someone would chime in with a " this is why that is an awful idea " .

[merlinb]

Yes, you could do it with two DC wallwarts. But you could also do it with one *AC* wallwart, using a voltage doubler circuit:


If you want it to be quiet then you really need to add voltage regulators.

[R.G.]

Geofex.

"Power Supplies Basics".

[Paul Marossy]

Yes, you could do it with two DC wallwarts. But you could also do it with one *AC* wallwart, using a voltage doubler circuit:


If you want it to be quiet then you really need to add voltage regulators.

This makes more sense to me than using two big old wall warts...

[R.G.]

This makes more sense to me than using two big old wall warts...

Yes, it does, IF:
(1) you have an AC, not DC wall wart to use
(2) you have large filter caps: the half-wave rectification needs caps at least twice as big as a full wave rectified circuit for the same ripple reduction
(3) wall warts are big (and maybe old); some are quite small
(4) you want to build AC-DC rectifier/filters, as these will make a lump about the size of another wall wart.

It all depends on where you're starting from, what you have at hand to work with, and how hard/expensively you are prepared to work.

[Paul Marossy]

I'm more in the "whatever it takes to do it right" camp. 

[R.G.]

I'm more in the "whatever it takes to do it right" camp. 

Me too. But I find that "right" means different things depending on the situation.   

[Paul Marossy]

I'm more in the "whatever it takes to do it right" camp. 

Me too. But I find that "right" means different things depending on the situation.   

Yes, that is a good point.

[petey twofinger]

thanks

i am gonna try this on the BB