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Off-The-Shelf Linear PS for Pi?
Off-The-Shelf Linear PS for Pi?
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Old 4th February 2018, 04:43 PM   #11
scottjoplin is offline scottjoplin  Wales
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A linear power supply is not inherently less noisy than a SMPS, there are good and poor ones of both kinds
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Old 4th February 2018, 04:47 PM   #12
BillTheCat is offline BillTheCat
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Originally Posted by scottjoplin View Post
A linear power supply is not inherently less noisy than a SMPS, there are good and poor ones of both kinds
Given the objective of maximizing the performance of a Pi-based DAC, would you say a good switching supply would do as well as an LPS?

I already have a couple of the Meanwell RS-15-5's on hand. Would you say this is adequate? Also, do you think this is enough to power both the Pi and the DAC, or should I use two?
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Old 4th February 2018, 05:03 PM   #13
scottjoplin is offline scottjoplin  Wales
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2 amp SMPSs are used with the Pi, what DAC are you using?
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Old 4th February 2018, 05:05 PM   #14
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Originally Posted by scottjoplin View Post
2 amp SMPSs are used with the Pi, what DAC are you using?
HiFiBerry DAC+Pro XLR.
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Old 4th February 2018, 05:21 PM   #15
scottjoplin is offline scottjoplin  Wales
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One of the Meanwell power supplies will be fine, have you tried it, is it noisy? Have you means to measure noise if you can't hear any?
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Old 4th February 2018, 06:29 PM   #16
AndrewT is offline AndrewT  Scotland
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Originally Posted by BillTheCat View Post
Are these linear power supplies?


Sorry to say, I'm not even sure what this means. Seems there's some thinly veiled innuendo, but I'd be grateful if you can lead me to it. Perhaps you could just say what's really on your mind?
Members who are conversant with linear tend to stay with what they already know.
Members who are digital/switching tend to be more comfortable with what they already know.
You as a Pi specialist is already digital/switching. You already have switching PSUs. To me that means you know about switching so a switching PSU may be what you should use.
No innuendo, just common sense.
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Last edited by AndrewT; 4th February 2018 at 06:31 PM.
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Old 4th February 2018, 06:32 PM   #17
BillTheCat is offline BillTheCat
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Members who are conversant with linear tend to stay with what they already know.
Members who are digital/switching tend to be more comfortable with what they already know.
You as a Pi specialist is already digital/switching. To me that means you know about switching so a switching PSU may be what you should use.
No innuendo, just common sense.
I'm not sure where you got the idea I was a "Pi specialist". I'm nothing of the sort. And if I knew what I was *really* doing, I wouldn't be asking, now would I? Or, did you think I had nothing better to do than to invite all sorts of silliness in the form of comments?
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Old 4th February 2018, 06:35 PM   #18
BillTheCat is offline BillTheCat
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Originally Posted by scottjoplin View Post
One of the Meanwell power supplies will be fine, have you tried it, is it noisy? Have you means to measure noise if you can't hear any?
As I said in another thread, to do a proper analysis would entail multiple configured variants of Pi/DAC/PS/SD/Software assemblies to do a proper A/B/C/D... testing. That would also tie up four or five hundred dollars, when all I'm really after is just one. So I figured I'd just get right to it and ask from those of you who have likely already gone down this path.
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Old 4th February 2018, 06:56 PM   #19
scottjoplin is offline scottjoplin  Wales
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I'll take that as a "no"
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Old 4th February 2018, 06:57 PM   #20
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I'll take that as a "no"
LOL. Yep. Well, actually, I am using the meanwell to power the DAC and the wall wart to power the Pi. But improvements are always welcome.
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