In my opinion, this power supply produces far too much noise!
I recommend using a module with an ultra-low-noise linear regulator for the DAC, e.g., LT3042 or LT3045
for example,
I use this for the clean side of the DigiOne Signature and Toppiung E50 DACs - and I think it’s fantastic!
I’m sure there are other very good linear regulators. The important thing is to have as little noise as possible.
For the RPI, I use an ifi-Audio 5V power supply. A standard RPI power supply might also suffice.
Please note the required current of the RPI.
R-Core transformers are recommended.
I did it this way and am completely amazed at how much better the sound became.
I know many people don’t believe that the power supply makes much of a difference. All I can say is - it’s your own fault…
thanx for your response but at this moment my question was not about advice for a different power supply but advice for what toroidal transformers I should get.
Do I need a 230v 2x12v and a 230v 2x5v transformer (maybe 50VA or 80VA) or should I get like a 2x6V and 2x15V transformer. Or is there a (affordable) transformer that does all the voltages that I need?
For now I am sticking to this power supply but maybe in the (short) future I will replace it with a better one.
This would cover all voltages.
The DC voltages would then be quite high in terms of heat dissipation. However, this doesn’t matter, as the DAC requires very little power and therefore generates little heat dissipation.
Thanx for this advice! Sadly it isn’t in stock so I’ll have to wait a bit… or maybe someone else has a tip about a transformer that is available somewhere
that looks like a nice supply! For now I am gonna stick with what I have, always room for improvement
Just ordered and received 5V and 12V toroidal transformers from Amplimo, a brand that has quite a good reputation in the Netherlands and I’ve already used once in a Gainclone amplifier.
Yesterday I received almost all the gear that I am going to use.
As extra I ordered a IR receiver and (and it works beautifully) a SPDIF to USB interface so that I can also connect other digital audio sources (TV) and use the DAC.
One thing I stil need a solution for: how am I going to shut down the power supplies without having to use an actual switch. It is quite easy to shutdown and power on the Raspberry itself but I didn’t find a solution yet to power off and power on the supplies/DAC.
Need something that is always on and used almost no power and can control a relay to switch the 12v and 5v power supplies on by using a momentary push putton.
I would like to use the switch of one of the rotary encoders to actually do this.
Made a test version of the front with my 3D printer.
Clean and basic: 2 rotary encoders, a hole for a IR led and the screen in the middle. The buttons lay back in the front about 2mm. The IR led wil be covered by some dark/smokey plexiglas.
I almost have my setup complete, waiting for the last materials (cables/adapters).
Tested my Volumio setup and have most of it working:
GPIO Controls plugin to power on/off the linear power supply for the DAC using a relay
Rotary Encoder II plugin for control. Had to disable I2C as this used GPIO 3 that I need to power on/off the RPI
IR plugin to do remote control
Touchscreen plugin
USB Toslink adapter to use as a input (TV sound)
So now I can start on assembly (power supply) and testing the DAC module and after that I can mount it all in the case and getthe faceplate and backplate done.
Bought USB/RJ45/HDMI D-Type chassis parts for those parts and printed a D-Type plate for the Toslink coupler
