3x powersupply for rpi

dragos_nedelcu

ricky007 wroteHello, do I have the onboard regulator removed? or is it enough to connect the power to PP9, PP7, PP5, PP8?
greeting
Ricky

I believe you should remove the regulator and the 2 inductors L1 and L2. I couldn't desolder so i ripped them with a plier. Not too clean, but it worked.

rastus

dragos_nedelcu wroteThe low freq are a bit booming. Hope the effect will go with burn in.

And, you will keep us updated of course, right?

dragos_nedelcu

rastus wrote
dragos_nedelcu wroteThe low freq are a bit booming. Hope the effect will go with burn in.
And, you will keep us updated of course, right?

Now it sounds sweet. I fotgot about the boom. It is gone with burn in.

rastus

Sweet is always good... and the boom has gone, good.... so all's well that ends well... good.

thanhvo31

Thí guy sell the board with pre config modules
Mezzanine Power board for Raspberry Pi.
http://www.ldovr.com/ProductDetails.asp?ProductCode=Mpower

dragos_nedelcu

It should be good, but: you still have the 2 noisy inductors and the regulator on the pi. If you remove them and use this, it might not work. And the pinout of pi3 doesn't have 1.8v.

gumof

is it possible to run rpi 3b+ without 5V -I don't need it..

nano35

Thanks for the instruction. A late comer here who modified a RPi3 model B with linear PS for 5V, 3.3V & 1.8V.
The audio improvement is enormous!
More dynamic, more power, more details, more engaging!
I am extremely happy with it.

Now someone mentioned about the C97 / C98 capacitors modding behind the USB unit.
I am eager to try it out and like to know in detail what to buy and how to install it.
I am a fresh DIYer and hope someone can help me out.

Thank you again.

My gear list:
RPi3 model B;
50VA transformer 2x9Vac secondary winding;
LT3045 regulator module to go down to 8Vdc;
then LT1963 regulators for 5V, 3.3V & 1.8V;
WD 500GB SSD;
EDUP wifi dongle;

linh0983

Hello!
This is a 3x power supply for my Pi3 after removing ic smps .

Jp2018

I am going to do this same mod to Compute CM3L module, I am using the Geekworm IO board. I've looked at the schematic for the official evaluation board but mine is a little different, is there anyone here who could help me out, what needs to be removed and where to connect the regulators.

I've located the PAM2306 chip and the L1 and L2 inductors. The only thing that confuses me, is that there is a TPS61090 on the same area near the inductors, anyone have any idea is it on the 3.3V or 1.8V supply? If i just remove the inductors and use those pads as input for the new supplies, is that okay? And should I remove the PAM2306 or do I need to renomove the TPS61090 too? Or can they be left untouched if I remove the inductors?

drone

Hi,

to make things a little bit clearer to me:

It would be better to feed the Pi with separate power supplies for 5V/3,3V/1,8V even if I use a DAC head with own "clean" power supply?

thx

Branko

RPi 3B+ and IQaudIO DAC+ pro

dragos_nedelcu

drone wroteHi,

to make things a little bit clearer to me:

It would be better to feed the Pi with separate power supplies for 5V/3,3V/1,8V even if I use a DAC head with own "clean" power supply?

thx

Branko

RPi 3B+ and IQaudIO DAC+ pro

Of course. And to take things even further, you could use an usb isolator with linear power supply on the way to the dac.

dragos_nedelcu

drone wroteHi,

to make things a little bit clearer to me:

It would be better to feed the Pi with separate power supplies for 5V/3,3V/1,8V even if I use a DAC head with own "clean" power supply?

thx

Branko

RPi 3B+ and IQaudIO DAC+ pro

Have a look on Singxer UIP 1. You can find the subject on a forum.

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