3x powersupply for rpi

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Re: 3x powersupply for rpi

Postby dror » 11 Sep 2017, 11:34

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Re: 3x powersupply for rpi

Postby fboe » 11 Sep 2017, 12:20

dror wrote:Hi
You mean this for example?
http://www.ebay.com/itm/2017-15VA-DC5V- ... SwNRdX~Fqq

Cheers


Hi

Yes, that could work, just remember to order the 5v edition ;-)

Cheers
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Re: 3x powersupply for rpi

Postby dror » 12 Sep 2017, 06:49

cheers
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Re: 3x powersupply for rpi

Postby hkknudsen » 17 Sep 2017, 20:15

-
Last edited by hkknudsen on 15 Oct 2017, 08:25, edited 1 time in total.
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Re: 3x powersupply for rpi

Postby dror » 19 Sep 2017, 06:32

fboe wrote:
dror wrote:You can use the standard psu to pin 2 and 6 - but its a noisy switchmode, so I would recommend a linear psu. They can be found on ebay to a good price.
Cheers


Hi, finally I did attempt to use the regular plug psu to feed the GPIOs.
Now, I have a Hifiberry DAC+ on top of them, so I released it, pluged on the wires and re-installed the DAC ontop.
First, power was on but Rune was not loading. Rebooted, this time Rune came up. I then started a play, but after a few seconds the playback stopped.

I removed this for now, but is it related to having the DAC on the GPIOs ?
dror
 
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Re: 3x powersupply for rpi

Postby fboe » 19 Sep 2017, 07:14

dror wrote:
fboe wrote:
dror wrote:You can use the standard psu to pin 2 and 6 - but its a noisy switchmode, so I would recommend a linear psu. They can be found on ebay to a good price.
Cheers


Hi, finally I did attempt to use the regular plug psu to feed the GPIOs.
Now, I have a Hifiberry DAC+ on top of them, so I released it, pluged on the wires and re-installed the DAC ontop.
First, power was on but Rune was not loading. Rebooted, this time Rune came up. I then started a play, but after a few seconds the playback stopped.

I removed this for now, but is it related to having the DAC on the GPIOs ?


Try to connect the power directly to the P3 on the dac - that will also feed the rpi.
fboe
 
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Re: 3x powersupply for rpi

Postby ciuffoly » 20 Sep 2017, 15:26

Do you use external usb audio interface or internal ?
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Re: 3x powersupply for rpi

Postby dror » 24 Sep 2017, 06:57

fboe wrote:Try to connect the power directly to the P3 on the dac - that will also feed the rpi.


Where is that? on the Hifiberry?

ciuffoly wrote:Do you use external usb audio interface or internal ?


What do you mean? the DAC is not conneted via usb
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Re: 3x powersupply for rpi

Postby ricky007 » 03 Dec 2017, 11:16

Hello, do I have the onboard regulator removed? or is it enough to connect the power to PP9, PP7, PP5, PP8?
greeting
Ricky
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Re: 3x powersupply for rpi

Postby dragos_nedelcu » 05 Dec 2017, 21:12

I did something similar. Removed the regulator and 2 inductors. Almost impossible to desolder so i ripped them with a plier. The thing is so small that i ripped c4 in the process as well so i attached another cap instead of about the same size. After that i connected the 3 voltages at L1, L2 and D5. Now about the sound. I believe it needs some burn in time. After a few hrs, the soundstage is deeper, i can hear some more details on the strings, like the fine treble and something on the background that was not there. These are the +. Now the -. The low freq are a bit booming. Hope the effect will go with burn in.
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