Raspberry Pi I2S to SPDIF Hat

On a 24V supply what is the current requirement? The first one I have to hand here is 24V 400mA 9.6VA and I think you have said that PI2AES draws very little current. Would the Power Supply IC give enough current for The Pi from this?
(Looks like my delivery is in the country now so hopefully give it a try soon.)

 

That should be enough to run the PI2AES by itself. It will not be enough to run the PI.

Michael

 

OK, though to get going a standard Pi supply could be used separately for the Pi. I also have a 19V 3A supply, will this get close enough on the voltage side?

 

I should clarify about the voltage required, it only needs to be around 14 to 15V. So we moved up to 24V because that was what I thought was the next standard jump. I totally forgot about 19V supplies that are typically use for laptops. Of course they have way more power than is required, but if it happens to be lying around use it.And you can power the pi then. The 5V switcher that is on PI2AES is about 90% efficient, so in order to supply the PI with 15W (5V @ 3A) the power supply needs only be 17W or better.

Cheers,
Michael

 

Note that you don’t need 3A if you don’t have any attached USB HDD or WiFi dongle.

I run all my Pi streamers with 5V / 1A supplies. That’s for RPi 3B+ with WiFi enabled and a HAT attached (e.g Allo DigiOne).

The only time it wasn’t enough was with the Yggdrasil A2 beta Unison. It needed slightly more power. The Bifrost 2 Unison worked just fine in the same setup, so I was really at the limit with the Yggdrasil. It probably would have worked fine had I not had a HAT attached.

You’ll be fine with 24V/400mA if you’re use case is similar to mine.

 

The only times I've had issues with 1A have been when doing initial setup. After putting a card with newly-flashed Volumio into the Pi, it often either wouldn't be seen by my network (whether wired or wireless) or wouldn't complete the setup process. It might have been coincidental, but I presume all the writing required on initial setup, plus the connection, require a bit more power. Using the standard SMPS the process has always completed on the first attempt.

Once set up though, actually running it with 1A (3B+, wireless, HiFiBerry Digi+, Modi Multibit) works fine. It even worked with a wifi dongle when I was trying to compensate for distance from the access point.

 

Hmmm...I wonder if that is why I have some issues changing software. I tried changing over to DietPi and it would never load. It looks like it tries and then fails. Mind that one is the DigiOne Sig and is powered by a dual channel 5V @ 2A/channel LPS so it shouldn't have issues, but I suppose it's possible.... I should try using the standard plugins...

 

I'd have thought 2A would be fine - like I said it might be coincidence in my cases and the initial setups of many of these systems are notoriously flaky - but I don't recall ever having a problem when using the RPi switcher (>3A)...

 

I actually had a similar behavior a few times. Changing the software would actually work so I'm not sure.
I had that problem at work with the USBridge Signature. While Ropieee XL worked fine at home, I couldn't get it to install at work. It would never show up on the network. Switching over to Allo's DietPi did the trick.
I was running my trusted 5V/1A Jameco wall regulated PSU.

 

Had another rummage and found a 24v supply which works for now, also have a linear 13.8V 2A supply (which I think was a standard in ham radio) so may try that one as well. Haven't tried I2S yet but have sent a message to sales as I had a query on the included stand-offs. Thank you.

 

Sorry about the standoffs. We had a mis-marked bag that were M3 18mm male-female instead of M2.5. We've order more, and will send as soon as we get them. But if you find them local we will refund you the cost.

Michael

 

Thanks Michael, I had some here that got me to about the right height. Hopefully close enough to match up with case though not tried that yet.

 

I should have mentioned, the height is 18mm (0.7 in).

Michael

 

@Michael Kelly
Dear Michael, could you please clarify, I am totally confused now regarding new voltage requirement for PI2AES.
On the official web its - input voltage 24V (+/- 10%)
Here yo say - it only needs to be around 14 to 15V.
The original version was clear indicated 12V-48V..
How is it now?! 12V-24V? Is 12V battery still can be used, or need to be set in serie 12+12 to deliver 24V?
Thank you.

 

I am sorry for the confusion. The board supported 12V to 48V, but after we received a new batch of TI power chips, they needed more than 12V, about 14-15V. We then determined that the best course of action was to increase the minimum to 24V. That is now the recommended supply, but it will run with a lower voltage, just not as low as 12V anymore.

Michael

 

Thank you Michael.
understand.
.. and this is also true when PI2AES powered separately from RPi.. right?
I mean if only PI2AES powered, 12v will be not enough anymore.. correct?

 

That is correct. Powering the PI separately does not change the minimum voltage, just the amount of current.

Michael

 

I am embarrassed to ask this... but I cannot find a straight answer on any of the forums I have searched. So I thought it was worth asking assuming others 'might' have the same question.

I am almost computer illiterate... but want to learn/challenge myself and do this... but can't figure out if it is possible.

Goal:
- Stream Qobuz/Spotify with a Raspberry pi + Pi2 AES hat using roon and use my phone/tablet as a remote to control roon on the pi.

Confusion:
- This single raspberry pi acting as a roon end point is enough to stream and that is it?? And I can easily control this with my tablet or phone?

Everywhere I read people mention a roon core... bridge... endpoint... I don't understand what is necessary when using just a pi as the streamer/source. It's seems like yes the pi as a roon end point is enough, but have been reading some conflicting info on other sites.

I want to give Pi 2 Design business but want to make sure my expectations are correct.

Learn me up and if I missed this somewhere already posted forgive me.. I searched...

Thanks!

 

Just install RopieeeXL in your Raspberry Pi and it will work as Roon end point and you can stream Spotify as well from your mobile and in case if you have ios devices RopieeeXL supports airplay as well.

 

If you actually want Roon, you do need a Roon Core (server) located somewhere on your home network, doesn’t matter where as long it’s on the same network as the RPi. This can be any PC or Mac that meets the minimum system requirements to run it.

Just a Roon Endpoint (RPi + Pi2AES) won’t do it - you need the Core as well.

Roon will run Qobuz, but not Spotify. However as @Ksaurav402 says, you can run Spotify directly from the Ropieee XL Operating system if you want, and you control it with the Spotify app on your phone - no Roon involved.

I haven’t used Ropieee XL yet, but @Ksaurav402 i assume you need to switch modes in RopieeeXL in order to go between Roon and Spotify Connect as an output mode?