Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter

[qusp]

aha nope that was a mistake, can you send the second one back? I just grabbed the baggies I guess I forgot I hadnt taken mine out. what do you have there exactly? you mean 2 x 49 right? because I took my 45MHz one out and have that here in front of me, but dont have the 49.xx

AR2, you want a larger one than the ones Ian sent, because his break after a little while as they are too tight

 

[PET240]

Can check in zee mornink. No worries to send back, dang thought I'd scored then......

Bugger darn crikey!

 

[glt]

Wow...Thank you guys. Just one small question and two pages of ideas. You guys are awesome. Here is what I found. First I was thinking about some rubber seals for plumbing, than I remembered this place that I use for screws and bolts when needed, They have everything. Official title to search for - O Rings:
McMaster-Carr
What would really help is if anyone has original Ian's rubber rings, to share aprox diameter. Ether ID or OD would work.

Home Depot is a good source (the plumbing aisle)

 

[necplusultra]

homemade silicon tubing and o-ring:

Homemade silicone O-rings and tubing

 

[qusp]

hehe umm I think this method might be a little tricky at this tiny scale lol

 

[hochopeper]

hehe umm I think this method might be a little tricky at this tiny scale lol

And your dac build was a walk in the park? Not all Good Things^TM are meant to be easy

 

[PET240]

Aren't we supposed to be at work......;-)

 

[qusp]

I am at work lol

 

[PET240]

No need to skite......

 

[marce]

Toolstation > Plumbing > Washers & Fixings > O Ring Pack 85pc

Cheaper than making your own, and less fraught with problems, cool though.

 

[bigpandahk]

I am sure it was mentioned somewhere before, but for a late bloomers.... is there any source for rubber rings that you guys could recommend?
Thank you

I bought some nature rubber o-ring for the clock board. Photo at post #108 - http://www.diyaudio.com/forums/digital-line-level/212747-build-thread-tpa-biii-ian-async-i2s-fifo-opc-ntd1-salas-sslv-11.html#post3142449

Drop me a PM and I can send you some.

 

[GOR3]

LED Current

Ian, I am finally getting to the case work. Regarding the LEDs to indicate "locked" and the source selected (TTL, Coax, Optical), can the board power 20mA LEDs, or should they be low current types (i.e., 2mA)?
Thanks,
George

 

[qusp]

why would you want a 20ma LED in a low noise environment? I presume its blue or white too? these are the highest noise too. very doubtful it would run it, not many receiver/logic chips have power for 100mA in LEDs...

the noise isnt a huge deal, but it all adds up, just seems unnecessary. do you know how annoying blue LEDs that bright are?

 

[iancanada]

Ian, I am finally getting to the case work. Regarding the LEDs to indicate "locked" and the source selected (TTL, Coax, Optical), can the board power 20mA LEDs, or should they be low current types (i.e., 2mA)?
Thanks,
George

why would you want a 20ma LED in a low noise environment? I presume its blue or white too? these are the highest noise too. very doubtful it would run it, not many receiver/logic chips have power for 100mA in LEDs...

the noise isnt a huge deal, but it all adds up, just seems unnecessary. do you know how annoying blue LEDs that bright are?

Thanks qusp,

The current limitation resistor on the s/pdif board is 1K for each LED. So, theoretically the current limitation would be 3.3mA. Roughly, if your LED is 2V, the working current will be 1.3mA . Small enough? Recommend high light version LED with color other than the white and blue.

Ian

 

[qusp]

ya, I havent gotten around to casework that advanced yet, so didnt quote actual levels, but was pretty sure 20mA wasnt on the cards =) forgot about that schematic you posted

 

[iancanada]

PCB order placed. Hopefully I can get all of the PCB samples by the end of next week. They are isolator, passive battery management and the Si570 clock board.

Ian

 

[hochopeper]

Ian, you are one unbelievably productive man!

 

[TheShaman]

Ian please keep us updated on the battery management board as well! I'm definitely interested.

 

[wktk_smile]

I'm looking forward to see the reports from testers!

 

[AR2]

I bought some nature rubber o-ring for the clock board. Photo at post #108 - http://www.diyaudio.com/forums/digital-line-level/212747-build-thread-tpa-biii-ian-async-i2s-fifo-opc-ntd1-salas-sslv-11.html#post3142449

Drop me a PM and I can send you some.

Thank you bigpandahk,
no need to bother you. I have a source here and I already ordered a few. I appreciate it very much that you are willing to send.

Best
AR2