ezDAC v.1.5 Builders Thread - Page 20

6h5c · 07:14 PM

I see, both BOM's list values that won't give you 12V or 15V... confusing

Now you know how they work, and able to calculate the correct values for no more troubles in the future

Ray

PJN · 4th February 2010, 07:25 PM

Yea it is confusing especially if you don't know what you're doing like me. I'm glad I have your BOM for the EZDAC.

ezkcdude · 5th February 2010, 03:56 AM

Quote:

Originally Posted by PJN

Yea it is confusing especially if you don't know what you're doing like me. I'm glad I have your BOM for the EZDAC.

If you're using the LM317/37, make sure to read the datasheet. The formula for calculating voltage is very simple (assuming the adjust current is negligible). I always assume people don't take my BOM values on blind faith, but I suppose that has not been the case.

paulb · 06:16 PM

I did run across this as a USB-SPDIF kit:
The γ1 Modular Miniature DAC configuration C, USB-SPDIF
I want a relay to switch between USB and SPDIF and am looking at if it's feasible with this kit.
Their headphone amps look good too.

PJN · 9th February 2010, 01:59 AM

Hi All,

After watching a primer on SMD soldering on U tube I finally got the courage up to try any start populating the DAC board. It wasn't so bad after all. I do have a question on the orientation of U 4 and U5. In the picture that I've seen folks used the AD8610, but I used the LME4971 since digikey was out of the AD8610. In the attached pic I have U2 and U3 attached, but U5 is just sitting there. Is the LME4971 in the proper orientation to solder in ?

Thanks,

PJN

ezkcdude · 9th February 2010, 03:24 AM

Looks right to me. Pin 1 (not connected) would be the lower left pin there right next to pin 2 which is under the "MA".

PJN · 9th February 2010, 08:39 PM

Evan,

Thanks for the info, I'll try to post more info as the build progresses so others can avoid my mistakes.

PJN

paulb · 12th February 2010, 07:36 PM

I'm happy to report that my ezdac is up and running. I'm working on it as lunchtimes permit at my workplace (where I have access to SMD rework equipment). I used an SPDIF output from my PC, with a small passive network to change from 'TTL' to the proper level, to test it.
Now it's time to turn my attention to the companion USB/SPDIF board that I mentioned in some previous posts. Hope to have a schematic sometime next week.

merlin2069er · 12th February 2010, 07:43 PM

Great, that's good to hear. Hopefully I get mine up and running soon.

mikel_ann · 13th February 2010, 03:12 PM

A new star is born , thanks Evan.

4th February 2010, 07:11 PM	#191
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	I see, both BOM's list values that won't give you 12V or 15V... confusing Now you know how they work, and able to calculate the correct values for no more troubles in the future Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out! Last edited by 6h5c; 4th February 2010 at 07:14 PM.

7th February 2010, 06:09 PM	#194
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	I did run across this as a USB-SPDIF kit: The γ1 Modular Miniature DAC configuration C, USB-SPDIF I want a relay to switch between USB and SPDIF and am looking at if it's feasible with this kit. Their headphone amps look good too. Last edited by paulb; 7th February 2010 at 06:16 PM.

9th February 2010, 03:24 AM	#196
ezkcdude diyAudio Member Join Date: Dec 2005 Location: Atlanta	Looks right to me. Pin 1 (not connected) would be the lower left pin there right next to pin 2 which is under the "MA". __________________ He's not hi-fi, he's my stereo. ShinyMetal

12th February 2010, 07:43 PM	#199
merlin2069er diyAudio Member Join Date: Sep 2008 Location: Toronto	Great, that's good to hear. Hopefully I get mine up and running soon. __________________ F5 / B1 / dcb1 / Monica Dac / ezDac / Dynaco ST 35 / Lightspeed attenuator

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4th February 2010, 07:25 PM	#192
PJN diyAudio Member Join Date: Dec 2004 Location: Pa, USA	Yea it is confusing especially if you don't know what you're doing like me. I'm glad I have your BOM for the EZDAC.

9th February 2010, 08:39 PM	#197
PJN diyAudio Member Join Date: Dec 2004 Location: Pa, USA	Evan, Thanks for the info, I'll try to post more info as the build progresses so others can avoid my mistakes. PJN

12th February 2010, 07:36 PM	#198
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	I'm happy to report that my ezdac is up and running. I'm working on it as lunchtimes permit at my workplace (where I have access to SMD rework equipment). I used an SPDIF output from my PC, with a small passive network to change from 'TTL' to the proper level, to test it. Now it's time to turn my attention to the companion USB/SPDIF board that I mentioned in some previous posts. Hope to have a schematic sometime next week.

13th February 2010, 03:12 PM	#200
mikel_ann diyAudio Member Join Date: Dec 2008	A new star is born , thanks Evan.

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