[sdiy] Quick Question about Grounding Power Supplies

Vladimir Pantelic vladoman at gmail.com
Fri Jul 3 21:47:18 CEST 2020


On 03.07.20 21:34, Shawn Rakestraw wrote:
> Some of you may remember helping me learn how to design some PCBs a few
> months back. I have been using one of my homemade eurorack cases for a
> while now. To refresh the idea, it is essentially an electronotes design
> where a 24V center tapped transformer is regulated down to +12V and -12V.
> My question is this - Should the ground pin of the power cord be
> connected to the center tap of the transformer? Currently, I have it
> connected to the "Earth" terminal of the power switch and it is also
> connected to the "Body" of the transformer, but I have left the center
> tap "Floating".
> After putting a Make Noise Pressure Points module into the case and
> noticing what looks like a lot of noise on the signal, I think that
> maybe the earth ground should connect to the center tap and floating ground.
> Thanks for your advice.
> - Shawn
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