pi based systems

[Pascal Hibon]

Looks good, it's inspiring me to upgrade too. Could I ask where you source your library power supplies and the specs? Thanks

Thank you!

I made the power supply PCB's myself. These where created for another project a couple of years back. And since I still had a few bare PCB's available I used those. The power supply is built around the LM350 (or NTE1929 is also an option). These are 3A adjustable regulators. Both PCB's, which are stacked upon each other by means of 45 mm standoffs, are set to output 5 volts.
The toroid transformer has two secondary windings, one for each power supply board.


The small PCB behind the transformer in the image is a 12 volts trigger input. The player can be switched on and off by a remote device.

[kingswindsor]

Thank you!

I made the power supply PCB's myself. These where created for another project a couple of years back. And since I still had a few bare PCB's available I used those. The power supply is built around the LM350 (or NTE1929 is also an option). These are 3A adjustable regulators. Both PCB's, which are stacked upon each other by means of 45 mm standoffs, are set to output 5 volts.
The toroid transformer has two secondary windings, one for each power supply board.


The small PCB behind the transformer in the image is a 12 volts trigger input. The player can be switched on and off by a remote device.

Good info, thanks Pascal but you are more advanced than I am! I am not at the stage of building one myself at the moment but is there a commercially available alternative that might be used/adapted? Switched power supplies are obviously generally available but linear power supplies to plug in and integrate seem to be difficult to find off the shelf. I do have an iFi power supply for one piCorePlayer but only noticing marginal improvements if any (but certainly no complaints).

[Pascal Hibon]

Good info, thanks Pascal but you are more advanced than I am! I am not at the stage of building one myself at the moment but is there a commercially available alternative that might be used/adapted? Switched power supplies are obviously generally available but linear power supplies to plug in and integrate seem to be difficult to find off the shelf. I do have an iFi power supply for one piCorePlayer but only noticing marginal improvements if any (but certainly no complaints).

It is not necessary to build your own power supplies; there are other options readily available. For example, a search on ebay resulted with this: https://www.ebay.com/itm/LT1083-Adju...-/324221756444

There are also a lot of very good switched mode power supplies available too. Technology has come a long way and most of them are pretty quite. The key thing in this build was to separate the RPI and display from the audio parts. The RPI for example adds some noise to the power supply rail due to its processor operating.

[myke2k7]

[Grumpy Bob]

I've put together a Pi-based server which I use as a test server and as a (relatively) portable server which I take with me when visiting family.

It's based on a Raspberry P 3B with a 2Tb SSD drive which carries a copy of my main library. I went through several iterations of this case, which used the main case body from an unused media player that I had kicking around the house. I don't much care for screens or glowing LEDs, so this is a bit Hotblack Desiato (who as I recall had a particularly black spaceship), though I did fit a red LED momentary switch on the rear of the unit. The momentary switch operates via an OnOff SHIM which connects via GPIO pins.
The front plate attaches via magnets so it can be easily detached to allow access to the SSD drive. The microSD card is mounted via a ribbon cable adapter so it's accessible without opening the case.

This server runs on pCP 6.1.0 and LMS 8.0.1. It isn't used as a player and I generally use the web interface and the Material skin to control it.



Robert

[Greg Erskine]

Cool!

What sort of temperatures do you get using a sealed housing?

[Grumpy Bob]

Cool!

What sort of temperatures do you get using a sealed housing?

After several hours, it feels barely warm to the touch. The main body is aluminium, and the end plates are perspex, also there's a fair bit of space inside for air to circulate.

Robert