Noise Toaster GROUNDING-Virtual ground to Battery Negative

[animalman]

Hi all,
I've built both a WSG and a Noise Toaster.

I can't really wrap my head around the following:

The ground on the WSG is Battery Negative. And according to the wiring diagram of the Noise Toaster, the "ground" here is the "virtual ground/Vref"....

If I want to connect both the WSG and NT together (both for patching and to share power supply), they need to share a common ground right?
And what is the common ground in this case when the NT's ground isn't the same as for the WSG.

Hope this makes any sense, and hope any of you can help shed some light.

Thx in advance
-animalman

[ashleym]

Hello and welcome.

It is pretty common for people to get a little confused about some aspect of the battery power design and nomenclature, so you are in good company.

You will need to join their earths together, or the BN connections. The voltage is a potential difference between each side of the battery but this doesn't have a reference to anything else. You are just giving both devices the same point to reference.

[animalman]

Thanks for the quick reply!
Yes it is confusing, but thanks for making it clearer. Now i think I understand why they behaved strange when connected together.