I plan to power my pi3 with a linear power supply.
Hifiberry digi pro power supply.
Power supply is only one external 12 18v power supply that will be connected directly to the hifiberry amp.
The raspberry pi will be powered by the amp.
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.
Power supply review by hans beehuyzen.
1 x 3 3v supply only for the digi pro.
Spdif is a 2 channel digital audio interface.
All of our boards support not just cd quality audio 44 1khz 16bit but also high resolution audio playback with 192khz 24bit.
You need to de solder the resistor r3 and connect your external 3 3v power supply to the pin header p5.
I connected the separate 5v to the p3 called soldering terminal on the digi board.
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.
However a small modification on the board is needed.
There are several opinions on the difference power supplies make.
I separated the power supply of the digi by removing the pin 1 from the p5 header of the raspberry.
Al other pins ground and 3 3 v are still in place.
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.
Additionally he explains how to connect a power supply directly to the hifiberry dac pro.
I m new and just began to build a raspi 3 with the digi pro.
Hans beekhuyzen tested various products and gives his personal recommendation.
If not could you tell me the closest i can get to my true goal for this.
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.
It is not allowed to connect 5v to the micro usb port of the raspberry pi.
Hifiberry digi boards add digital spdif toslink audio interfaces to your raspberry pi.
The hifiberry amp will be mounted on top of the raspberry pi.
I d like to equip raspberry pi and digi or dac each with separate power units.
How is the pin configuration for this aim.
The 5v of the raspberry and the 5v of the digi are galvanically isolated.
So that we are powering the chip purely from our linear power supply u2 must be removed.
February 20 2019 17 35.
The digital audio part of the digi pro can be powered independently from the power supply of the raspberry pi.
