DQ DAC 2, BIII SE, Tube-I-Zator, Arduino, Amanero Build

[DQ828]

Originally Posted by SCompRacer

I was hoping you would do the clocking thing sooner so I can figure out what to do with mine.

I like your plan!

Have a look at this if you haven't already Search Results flip H i F i D U I N O

[DQ828]

At this stage I'm looking at leaving the 5v secondary unused & power the Mega & Relays with the XP Power ECE10US12 12V 10W PSU. It will simplify things & as it will not be connected to the audio side of things shouldn't be a problem. I am using a similar XP Power PSU in the other DAC (it was a leftover from another project) and all seems to be working fine.

[DQ828]

I thought I'd put the design out before I get too far. I have added the Acko Isolator Reclocker board as it looks like it will make my life easier in the long run.
I'd greatly appreciate any comments.

Does anyone know the best way to power the Acko board & what voltage it needs.

[hochopeper]

Off the top of my head you'll need 3.3V supply to the acko board, unless he has provided a local LDO reg on the board, best to wait for the final BOM before worrying too much about that I think.

[DQ828]

Originally Posted by hochopeper

Off the top of my head you'll need 3.3V supply to the acko board, unless he has provided a local LDO reg on the board, best to wait for the final BOM before worrying too much about that I think.

I just didn't want to have to squeeze in another power supply rectifer regulator etc once I'd finished the design

The mega has 3.3 & 5V available, the BIII tranny & the other tranny have spare secondaries, so all I would need is a regulator I guess.

[DQ828]

As the B3SE only has one SPDIF input and I would like to have 2 or 3 SPDIF inputs, I need someway of switching between the inputs.

Does anyone know if there is a small suitable device available to do this?

As I will be controlling the DAC via an Arduino Mega I have the switching capability already on hand, if it is just as simple as installing a couple of relays I would greatly appreciate advice on what would be a suitable relay. I have read that SSR are not suitable for audio signals, but have no idea whether this is valid in all situations.

[DQ828]

Two layout options, I'd appreciate any thoughts.

The relays down near the AC inlet will probaly go on a PCB & be mounted vertically so they wont take up as much room as on the drawing. Everything is drawn to scale.

[qusp]

input and output have LDOs on the isolator/reclocker looks like lt1763 3v3 LDO on the input and a tps type on the output

[qusp]

Originally Posted by DQ828

As the B3SE only has one SPDIF input and I would like to have 2 or 3 SPDIF inputs, I need someway of switching between the inputs.

Does anyone know if there is a small suitable device available to do this?

As I will be controlling the DAC via an Arduino Mega I have the switching capability already on hand, if it is just as simple as installing a couple of relays I would greatly appreciate advice on what would be a suitable relay. I have read that SSR are not suitable for audio signals, but have no idea whether this is valid in all situations.

hmm small spdif switch, thats hard, agreed SSR are not a good idea. anything that would be suitable requires a proper PCB as I would only really suggest using some sort of comparator, 3 of them with enable pins. otherwise a MUX or something. not a simple task. if not going to do it really properly you may as well just use a mechanical switch really IMO.

[DQ828]

Originally Posted by qusp

input and output have LDOs on the isolator/reclocker looks like lt1763 3v3 LDO on the input and a tps type on the output

Sorry, I'm confused?