pi based systems

[Julf]

Very cool! Been thinking of doing something similar for portable use - already have one rpi inside a 1950's tube radio.

[Jeff07971]

Looking forward to see the details of these:-

https://www.hifiberry.com/beocreate

[wtnh]

Finished the RPI streamer for another friend.
This one has an internal power supply and is fitted with an SPDIF hat. Initially I planned on using the Hifiberry Digi+ but it doesn't work well with the display. The PCB sits over the display connecter and so obstructing the display cable. The Hifiberry "clone" does not have that issue. The clone also has a better supply filtering on board.
The streamer also has a 12 volts trigger input so that it is automatically powered on when the preamp is switched on.
Below are some pictures of the streamer:


[ATTACH]23031[/ATTACH][ATTACH]23032[/ATTACH]

OK - now I am inspired to clone your work ! I am planning to build in a power supply as well, but will use a Hammond toroidal transformer and a linear dual regulator like this one. This will enable me to separate the power for the Pi and the DAC (I have an Allo Boss). Also planning a combo switch/filter/fuse power input module.

A couple of questions:
- does this version use the same Hammond box as your previous ones - just not chopped as much? Looks like it is a lot deeper and I will need the extra room.
- Looks like you used a longer-than-standard display cable - where did you get that?

Thanks for a great design!

[epoch1970]

Wiring for high-power PSU

Some people like me want to give their amp some punch on the cheap and use enclosed PSUs. I thought I'd share about my way of doing this.
The general design is the same as this one: Pi 3, Justboom AMP Hat, 75W PSU, metal box.

This enclosure happens to look just vile, sorry for that...


There is as little material as possible inside the box, both in quantity and variety. The cables are of the high-temperature, low-smoke type. Ground wires are 2.5mm2, AC wires 1.5mm2, DC wires 0.75mm2. They are oversized considering high ambient temperature. Ground cables must be the last ones to melt, go fat and short. Audio cables are 1.5mm2, same type.


Accidental access to mains voltage can kill. I use a grounded alu shield to completely enclose the area. Also note the removable cover is grounded to the case. If the case is anodised, grind it to ensure bare metal contact at ground points. Ensure you have continuity between the earth pin of the power inlet and any part of the box: cover, case, chassis, shield, psu enclosure... everything. (And, no, earthing does not "kill wifi".)
Also, if you do a bit of cutting/grinding, make sure the inside of the case is clean and dust-free. You don't want a speck of metal to detach, land somewhere and cause a short-circuit.


Use a 3-pin power inlet with earth and AC fuse. Dimension your fuse according to the manufacturer's PSU input specifications and the expected power draw. If you can't find the specifications and tests sheet for your PSU... get another one.
Here you see a 250V/1.25A normal blow fuse. 1.25A is probably a bit large, even considering temperature derating. Also note the insulating adhesive feet under the case.


I hope this design is less unsafe than some I see floating around the Internet. And please chime in if you see an issue with it.

[epoch1970]

In a nicer looking vintage biscuit box. Sorry again for the eyesore above...

[epoch1970]

Altoids on steroids

Overly complicated project due to the box opening only from the top.

[epoch1970]

Last one, I think. Housed in a derelict Ténor TS 35 A case, circa 1934.
The USB thinggie is an EnOcean receiver.

[Pascal Hibon]

A friend of mine bought a Roomplayer from Simple Audio a few years back. The streamer has been sitting in the box for a couple of years until he asked me to help him set it up. We did install the streamer together and found out that the Simple Audio software is so outdated and poorly constructed. Since the company went out of business a few years back there was no way to upgrade the streamer.

The Simple Audio is housed in a beautiful enclosure and it is fitted with a good amplifier (ICEpower 50ASX; an amplifier build by B&O). It would be a shame to let those parts go to waste so I suggested to him to upgrade the Roomplayer to a Squeezebox device. Here are a few pictures of the internals:

1. The enclosure with the original Simple Audio PCB on right:



2. I fitted an aluminum plate that would serve as the bottom plate for the new streamer guts:



3. The final setup of the Squeezebox streamer:



4. The finished product:



From the outside it still looks like a Simple Audio streamer but it now is a Squeezebox.
If anyone is interested, these are the parts I used:

* An RPI model B
* An IQaudio DAC+
* a 5 volts SMPS
* a custom made trigger relay board (switches the amp on and off)
* a piece of breadboard containing the power LED and driver transistors for the LED and relay.

It's a tight fit but it works great.

[odw199]

A bit of a rushed picture, but here is my current main setup.

Raspberry pi running piCorePlayer into an All Boss DAC which then feeds an Onkyo 9010 amplifier out to KEF LS50 speakers.

So far very happy with the setup.

[s2kiwi]

Integrated option

I've gone for what looks to be a slightly different route from the rest of the photos on here. I've gone for a completely hidden install and in-ceiling speakers.

This is one of the ugly monster stacks I've built. This one includes:

• Two pi's
• 2 relays
• 2 100w mini amps
• Shared power supply for the amps

It may not look pretty, but it doesn't matter as it's all hidden away discretely. They are connected to in ceiling speakers in the various rooms, and configured so the various amps turn on/off with the players.

All in all I have 10 separate zones running smoothly.

[Grumpy Bob]

A bit of a rushed picture, but here is my current main setup.

Raspberry pi running piCorePlayer into an All Boss DAC which then feeds an Onkyo 9010 amplifier out to KEF LS50 speakers.

So far very happy with the setup.

[ATTACH]24483[/ATTACH]

How do you find the Kef LS50 speakers? I was toying with the idea of replacing my floorstanding Missions which take up rather too much space with some smaller speakers. Was thinking of giving the LS50 speakers an audition. Aesthetically I rather like the rose gold cones!

Robert

[Paul Webster]

I've gone for what looks to be a slightly different route from the rest of the photos on here. I've gone for a completely hidden install and in-ceiling speakers.

This is one of the ugly monster stacks I've built. This one includes:

• Two pi's
• 2 relays
• 2 100w mini amps
• Shared power supply for the amps

It may not look pretty, but it doesn't matter as it's all hidden away discretely. They are connected to in ceiling speakers in the various rooms, and configured so the various amps turn on/off with the players.

All in all I have 10 separate zones running smoothly.

Was that single "ugly monster stack" for 2 zones or more?

[edwin2006]

Why 2 pi's?

[atca]

maybe because

That means 5 squeezelite sessions on each rpi.
10 zones might be overkill but using two devices for that is imho a good idea..

But how do you get 10 zones from two amps? And two pi's with two line outs?

Sent from my Pixel 2 using Tapatalk

[odw199]

How do you find the Kef LS50 speakers?

Robert

Love them, they are my first proper speakers and they sound amazing.