Power supply for Raspberry Pi

edited July 25 in Digital
Anyone experimented with power supply upgrade for Raspbery Pi that had significant impact on sound quality? Any experience with the Official PSU?

Comments

  • I have the official wall wart supply with all three of my RPi3s, so I've never actually tried any of their rivals. At this stage of the game, I just wanted to make sure my supply provided enough current to keep the RPi stable. That it does.

    However, I'd like to try an audiophile supply, and will probably spring the £50-ish on the iFi iPower 5V.
  • Ah, yes, that's another option I hadn't considered. I'm an iFi fan, so would expect great things.
  • It's interesting that plugnplay review samples of music players from several suppliers have not included the RPi Official PSU, yet it's readily available and not expensive.
  • I'm guessing the pi psu is a pretty standard smps affair. A really well designed smps should be better (ifi?), a nicely put together linear would be better but 2A might be pushing it a bit on value.
  • 2A might not be required depending on how much load is being placed on the Pi. I use a 1.5A PSU with my Pi3 and it works fine, although I don't use any of the USB ports.

    Here's the one I use:

    http://www.diyinhk.com/shop/audio-kits/89-08uv-ultralow-noise-dac-power-supply-regulator-3357v-15ax2.html

  • Interesting, Chris.

    Now you've got me wondering what to get.
  • edited July 27
    I obviously don't have experience of the Pi but where I have used good quality linear psu's (DIY) there has always been a noticeable improvement, be it better dynamics, more detail or WHY. Apart from amplifiers I've used them in sensitive digital areas like 5v and 3.3v for DACs, oscillators etc. I also have a dual "5vdc USB injection" (sounds a bit Vrooooooom!) which I use between any sound USB device and PC for both recording and playback and wouldn't be without it now. All of these also have simple ripple rejection circuits to improve their quality further, very handy if you're not a super sonic PSU designer like Colin for example!

    If anyone wants pics you'll have to wait as they're on my main PC which is in transit and I have deleted my photo-racket account after they went from £0 to £400/A for 3rd party sharing!  On which subject...

    They must have really wanted to seriously clean out their servers. How many folk would actually go for that? A miniscule fraction of 1% maybe? If it was a cost thing a more reasonable, say, £25/A could have maybe seen 10% + sign up if the adverts died with it. I bet that would add up to some serious revenue. Then there's the advertisers, what will there reaction to costs be when they learn they're talking to a very reduced market after accounts have been closed/deleted/deserted?
    Mini rant over.
    :((
  • Yes, I've pretty much always got a good hike in SQ from adding a better PSU - digital and amplification.

    The iFi has had some pretty good things said about it, and TBH, I'm intrigued if is good as some people report. But, then I'id need to buy one of the others as a comparison...
  • Hi Alan and I built a few PSU's for the Pi with a new design not often used because of cost and got great performance. 
  • AntiCrap said:
    Hi Alan and I built a few PSU's for the Pi with a new design not often used because of cost and got great performance. 
    Care to tell us more? Are any of them a DIY proposition or are they just high-end retail?
  • edited August 6
    I found a PIC of my diy DAC on an old digi-cam sd-card, lots of PSU stuff going on.
    It's basically 2 DACS in one. A heavily modified Silicon Chip DAC kit based on S/Pdif and then a USB DAC based on an Amanero USB to I2S converter with isolation board, and a DIYHK I2S DAC board (can't remember model). A single switch on the front to change between them.

    How do you get pics hosted on flickr to show here?



  • cj66 said:
    I found a PIC of my diy DAC on an old digi-cam sd-card, lots of PSU stuff going on.
    It's basically 2 DACS in one. A heavily modified Silicon Chip DAC kit based on S/Pdif and then a USB DAC based on an Amanero USB to I2S converter with isolation board, and a DIYHK I2S DAC board (can't remember model). A single switch on the front to change between them.

    How do you get pics hosted on flickr to show here?



    Use the Insert Image button in the toolbar above. Click on it and paste in the URL for the image. 
  • edited August 6
    I canna get it  ta work cappin
  • edited August 6
    image
    Aha! gave up flikr, imgur works ok though...
  • cj66 said:

    image
    Aha! gave up flikr, imgur works ok though...

    Wow. There's a lot of work in there. =D>
  • It was a fun build, getting better with each tweak to the basic design. It was a group effort on another forum.
    Just remembered that the I2S DAC is a Curryman from minidsp, not a diyhk.
    As long as you don't require super hires rates via s/pdif the sq is amazingly good. Possibly the most rewarding self build I've done. The USB side is no slacker either.
  • Looks complicated. One day I may be able to do such a thing.
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