L-Adapter

[carsten.witt]

@jimk04,
thanks for your offer but I ordered yesterday from voelkner.de.

@euro21,
also thanks for searching.

 

[altsouza]

Hi @Salas
Few months ago I asked you regarding a High Power version of the Ladapter. I end up not buying it, I needed more power.
With the proliferation of diy High end music servers (generally i5 or i7 Pc’s) we are in need of High power ac-dc Psu. The idea is use it with Dc-Dc atx adapters.
Are you planing to design a 200-300w (9 to 22v) version of the L adapter?
Thanks
Antônio

 

[Salas]

Hi

I am not planning a 200-300W version for big computers etc. The design is possibly scalable maybe sometime in the future.

 

[altsouza]

@salas
Thanks
I think 200w would be enough for a i5 computer server.
Antônio

 

[carsten.witt]

@Salas, all,

found another distributor for the LED BAR Graph => reichelt.de

 

[katopis]

I built mine lately,in 5 volt version to power my Logitech Squeezebox touch.guys the difference with the stock smps psu is night and day.i can surely tell you that if you have a Squeezebox touch you have not heard it without L adapter.now,i can clearly hear my Benchmark dac3, through coaxial.salas bravo!

 

[katopis]

A few weeks ago a friend of mine brought me a bryston player,bdp2,and listened through Benchmark dac3.it was better than Logitech,but not far,now, with L adapter,my friend will cry his hardly earned Euros....the difference is huge!

 

[katopis]

My speakers are pmc ib2i and are like magnifying glass to the truth...

 

[katopis]

The caps i have used are epcos 10000uf and 4700uf

 

[Salas]

Nice to know that it worked so good for your Squeezebox player + DAC3 system. I just use the Foobar controller app on my mobile phone, that's my "player".

 

[andrewlebon]

l

Hello Salas
greetings after a long time finished the L Adapter on a rough pcb
will make it with better pcb and parts .THANK YOU for such a nice
project.
warm regards
Andrew

 

[Salas]

Andrew congratulations. Let us know how you will like it in application for sound.

 

[andrewlebon]

Hello Salas
greetings yes i will test them on my 3 dac players and tell you my
listening experience.
warm regards
Andrew

 

[Salas]

Watch to have proper DC Vin-Vout margin on those applications because your main capacitor banks look small. The L-Adapter manual explains in detail.

 

[TNT]

"PSRR -70dB or less 10Hz to 100kHz" ...

You mean: PSRR 70dB or better, 10Hz to 100kHz

?

//

 

[Salas]

Possibly. Can't remember exactly why I stated it like that when I was doing the guide.

 

[stew1234]

Hi Salas, do think the L adapter would have any problem powering the below ultra cap conditioner board at 5v? I understand the board to have a 1A charging current limitation.

DocumentDownload/UcConditioner5VUsersManual.pdf at master * iancanada/DocumentDownload * GitHub

 

[Salas]

I wouldn't expect it to have a problem, but most legit answer about any cautions or limitations on how to choose reg types for its power sourcing would come from the designer of that conditioner. If any limitations at all.

 

[InSides]

Hey Salas, many thanks for what is poised to be a great PSU option for the RPi4.

I have a few boards on the way, and as I am slowly gathering parts (I am having the PSU built by someone much more experienced than myself), a question:

I have on hand an encapsulated, double shielded 2 x 12V @ 50VA toroidal transformer. I understand that within the guide you recommend 9V transformers for a 5V (well, 5.1V output) - but is there any chance to use this transformer?

My initial plan is to have 2 PSU's built in the same enclosure with the same transformer - one for the RPi4, the other for an optional USB isolator if the need arises.

I'd like to be able to use this transformer, especially since getting a new one will delay the build significantly, but do not want to compromise on the PSU.

Any thoughts? Thanks!

 

[jimk04]

I have recently changed from 12v trafo to a 9v for my 5v L Ad powering Rpi 3b. I found the sink on Q2 was getting quite hot with the 12v...touchable but definitely very warm. Still warm with 9v but I am happier!