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Author Topic: ODAC external supply  (Read 8573 times)

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dBel84

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ODAC external supply
« on: July 03, 2012, 05:49:29 PM »
Quote from: Analixus on July 03, 2012, 06:44:51 AM
Quote from: dBel84 on July 02, 2012, 07:37:08 PM
I have the ODAC and what Purrin says about the power supply is true. I will modify mine to accept a regulated supply in due course.

..dB

Make a thread to share if you don't mind.  I might go that route if my external battery pack doesn't suffice.  Been thinking of one of these so I can run it w/ my phone via USB on the go.


http://www.streakwave.com/itemdesc.asp?ic=5VUSB&eq=&Tp=


I am on the road but if I didn't start this, I would forget to do it later.

The USB supply is easily interrupted, you could even do it externally with the Gizmo that you linked to. However cutting the pc voltage input and supplying your own would restrict noise contamination.

I will set up a pictoral guide for anyone interested ..dB
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Marvey

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Re: ODAC external supply
« Reply #1 on: July 03, 2012, 06:09:35 PM »
Indeed, with the adapter above and a regulated 5V supply, the ODAC could be pure win.
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ujamerstand

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Re: ODAC external supply
« Reply #2 on: July 03, 2012, 06:45:29 PM »
Ohhh, this is interesting. I could use this with the focusrite audio interface. :)
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LFF

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Re: ODAC external supply
« Reply #3 on: July 03, 2012, 10:36:03 PM »
Sweet!  ;D
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sachu

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Re: ODAC external supply
« Reply #4 on: July 03, 2012, 10:50:57 PM »
make sure you don't back feed the USB bus.. you could risk blowing your host controllers if you did that.

And that is clearly not USB -IF certified as its got an inline USB-A socket.

I'd want to see how much noise it injects by looking at an eye diagram.

as for the power supply itself, a salas shunt regualtor should do nicely here.
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Anaxilus.

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Re: ODAC external supply
« Reply #5 on: July 04, 2012, 12:25:52 AM »
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sachu

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Re: ODAC external supply
« Reply #6 on: July 04, 2012, 04:28:27 PM »
That is a much better solution. Perfect in fact.
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dBel84

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Re: ODAC external supply
« Reply #7 on: July 04, 2012, 09:09:38 PM »
I had taken a quick look at t earlier when I got home, thought that it offered the optimal solution - the mod to add a linear reg onto it for an external supply finishes it off ..dB
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32y0

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Re: ODAC external supply
« Reply #8 on: September 04, 2012, 06:12:37 PM »
Would like to try this. Any recommendations for the PSU?
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Chris1967

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Re: ODAC external supply
« Reply #9 on: March 28, 2013, 08:24:18 PM »
Hi all!

I have been busy with the ODAC and the potential is definitely there with proper regulated supply.

This is my first try and it transformed this little DAC into something i never imagined



Uploaded with ImageShack.us



Uploaded with ImageShack.us

It gave smoothness and extension (especially in the low end) and massive improvement in dynamics... also widened the stereo image... (and all this with very simple LM317 regulation)

I am going to make Salas shunt this weekend following what my friends have done in avclub.gr

I will keep you posted...

It is very worthwhile in my opinion...
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