[sdiy] Signals leaking into the PSU?

[David Huss]

I agree try to start small here to limit inrush current. Consider what happens when you have a ton of huge capacitors ("buckets") and you switch the power on — a big amount of current has to flow till all the caps are filled (inrush current). Your power supply must be able to handle that.

The higher uF values I mentioned are something I'd consider for power hungry big modules, maybe with digital parts and such. Start with small values and see what gets the job done

On February 20, 2023 5:42:08 PM UTC, Tony Allgood via Synth-diy <synth-diy at synth-diy.org> wrote:
>>  I must plug 100uF to 470uF caps between each rail and GND on every module as well as the bus board.
>
>No, don't do that. 10uF is quite sufficient. Any more than that will create a current surge that can, and probably will, cause problems when you first switch on.
>
>The key is low resistance from the power supply to the module. You don't need a fancy bus board. All you need are thick wires or even solid aluminium bars if your enclosure is going to be big. Use the thickest wire you can get without it being a nuisance. Star distribution, ie. each module connected back to the power supply using its own wiring, is probably best but this can be impractical so keep any shared wiring as thick as possible.
>
>Tony
>
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