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-   -   DIY TDA1541A PCB "D3" (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3.html)

ryanj 27th September 2018 12:27 PM

DIY TDA1541A PCB "D3"
 
Hi Guys,

I've started to design a new PCB for the TDA1541A to make space for the 14 decoupling caps that are needed for a 50Hz DEM.

This idea came about from ECdesigns in this post here: 50Hz DEM

This version is based on my previous design, click here to have a read.

Links:

PCB Order Form

Distinction-1541 V3 "D3"
D3 BOM
D3 Schematics
Photo of populated D3 pcb

Capacitance multiplier - designed for the D3
CMx PCB
CMx Photo populated
CMx details

If you're interested in the I2S to SIM PCB V1 or V2 click here.

ryanj 27th September 2018 12:32 PM

Quote:

Originally Posted by sumotan (https://www.diyaudio.com/forums/digital-line-level/79452-building-ultimate-nos-dac-using-tda1541a-post5558081.html#post5558081)
Since your making a new board, perhaps you should include the I/V stage on it as well Ryan. Don’t think many will adopt passive with opt as suggested by John.
Cost is at play here. You were playing with Cen Zen I/V, perhaps you could seek the designer’s blessing to incorporate this into your board ? Yes a new thread is the way to go.

Cheers

I've asked EUVL about using his circuit on a PCB... I got the feeling hes not overly thrilled about the idea. Plus Im not 100% sure im going to continue using it.

On the new PCB i've got some passive IV options, but it doesn't need to be populated.

batteryman 27th September 2018 12:46 PM

1 Attachment(s)
Quote:

Originally Posted by ryanj (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558092.html#post5558092)
Hi Guys,

I've started to design a new PCB for the TDA1541A to make space for the 14 decoupling caps that are needed for a 50Hz DEM.

We can use this thread to start an interest list to get an idea on numbers, and a general discussion.

Eg: "ryanj x 1"...etc

I suggest allowing for two 1541s, either in parallel or balanced. Maybe you could add some hardware to produce bit perfect inverted data for the second one.

Below is my version using IanCandad's I2Sto PCM board.

sumotan 27th September 2018 12:48 PM

Well I can understand your predicament Ryan. Your providing a service for use diyers to make things easier for us. Like John he's been so gracious all these years to share his wealth of knowledge & we all should be very thankful. I take it that John is ok with your efforts ? Back to D3 hmmm a tube stage would be nice. Lot's of experts here could chime in to share their thoughts.

Good luck

ryanj 27th September 2018 12:59 PM

Quote:

Originally Posted by batteryman (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558112.html#post5558112)
I suggest allowing for two 1541s, either in parallel or balanced. Maybe you could add some hardware to produce bit perfect inverted data for the second one.

Below is my version using IanCandad's I2Sto PCM board.

I plan on giving ECdesigns "signed magnitude" idea a go in the near future, so I want to make sure it is upgradable by just adding another D3 PCB. Also want to keep it as simple as possible this time around, and not everyone is going to be interested in running dual mono/parallel/balanced.

ryanj 27th September 2018 01:04 PM

Quote:

Originally Posted by sumotan (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558114.html#post5558114)
Well I can understand your predicament Ryan. Your providing a service for use diyers to make things easier for us. Like John he's been so gracious all these years to share his wealth of knowledge & we all should be very thankful. I take it that John is ok with your efforts ? Back to D3 hmmm a tube stage would be nice. Lot's of experts here could chime in to share their thoughts.

Good luck

Yeah its a balance of designing how I want it to be designed, and how I think would make it useable for DIYers.

Yes I asked John about these PCBs, and he graciously had no problem with it at all. Bless him.

batteryman 27th September 2018 01:11 PM

Quote:

Originally Posted by ryanj (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558124.html#post5558124)
I plan on giving ECdesigns "signed magnitude" idea a go in the near future, so I want to make sure it is upgradable by just adding another D3 PCB. Also want to keep it as simple as possible this time around, and not everyone is going to be interested in running dual mono/parallel/balanced.

If you could make the new pcb stackable using 2.54 pitch connector strips this would be a good way of covering all bases. (or a master / slave approach)

sumotan 27th September 2018 01:12 PM

Yes bless John. Frankly Iíve played with passive i/v way back but it wasínt a ear opener for me, perhaps a parallel TDA will wake it up.

Cheers

ryanj 27th September 2018 01:15 PM

Quote:

Originally Posted by batteryman (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558132.html#post5558132)
If you could make the new pcb stackable using 2.54 pitch connector strips this would be a good way of covering all bases. (or a master / slave approach)

I'll consider that. Cheers.

ryanj 27th September 2018 01:17 PM

Quote:

Originally Posted by sumotan (https://www.diyaudio.com/forums/group-buys/328060-diy-tda1541a-pcb-d3-post5558133.html#post5558133)
Yes bless John. Frankly Iíve played with passive i/v way back but it wasínt a ear opener for me, perhaps a parallel TDA will wake it up.

Cheers

True, with the current of an extra 1541 to play with, it might be a winner.


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