The hifiberry amp will be mounted on top of the raspberry pi.
Hifiberry digi pro power supply.
So that we are powering the chip purely from our linear power supply u2 must be removed.
At present the digi pro powered via the rp3 board which is being supplied with a usb 5 2v battery pack is sounding quite good but not as good at the my desktop pc with asus essence stx ii sound card.
Spdif is a 2 channel digital audio interface.
1 x 3 3v supply only for the digi pro.
February 20 2019 17 35.
Digi pro power supply relevant.
Hifiberry digi boards add digital spdif toslink audio interfaces to your raspberry pi.
I separated the power supply of the digi by removing the pin 1 from the p5 header of the raspberry.
The raspberry pi will be powered by the amp.
All of our boards support not just cd quality audio 44 1khz 16bit but also high resolution audio playback with 192khz 24bit.
1 x 5 2v supply only for the rp.
There are several opinions on the difference power supplies make.
If not could you tell me the closest i can get to my true goal for this.
Al other pins ground and 3 3 v are still in place.
For our purposes if we just supply our 3 3v to the p5 header with u2 in place the power going to the wm8804 is our 3 3v volt rail in parallel with the 3 3v from the ldo.
However a small modification on the board is needed.
Additionally he explains how to connect a power supply directly to the hifiberry dac pro.
How is the pin configuration for this aim.
Since the pi3 does not have the p5 header to power both the digi and pi3 i just need to supply power to the p3 of the digi.
The digi gets power from the pi so is the benefit of powering the digi and the pi form the p3 of the digi to eliminate any noise coming from the pi to the digi.
I m planning a complete separation of power supplies between raspberry pi and digi or dac.
Power supply is only one external 12 18v power supply that will be connected directly to the hifiberry amp.
You need to de solder the resistor r3 and connect your external 3 3v power supply to the pin header p5.
I plan to power my pi3 with a linear power supply.
Does the quality of the power source affect the audio quality.
Hans beekhuyzen tested various products and gives his personal recommendation.
Power supply review by hans beehuyzen.
It is not allowed to connect 5v to the micro usb port of the raspberry pi.
The digital audio part of the digi pro can be powered independently from the power supply of the raspberry pi.
The 5v of the raspberry and the 5v of the digi are galvanically isolated.
