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[Build Log] 5.25" Audio Spectrum Analyzer - Page 2

post #11 of 22
Thread Starter 
Got the DAC boards today and soldered everything. I powered it on and nothing happened. The 4.75 volt regulator wasn't putting out any voltage. I resoldered it and it somehow worked. Once I played something through it all I got was static. I looked at the PCB in Eagle and realized I had two signals between the receiver and DAC chip backwards. So I had to dig up the traces and solder on some wire. Such a pain. It then worked fine. I fixed it in Eagle and I am going to get new boards printed and order a whole new set of parts.
 
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post #12 of 22
Thread Starter 
Pictures.

bare_thumb.jpgassembled_thumb.jpg
 
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post #13 of 22
Quote:
Originally Posted by ramicio View Post

Got the DAC boards today and soldered everything. I powered it on and nothing happened. The 4.75 volt regulator wasn't putting out any voltage. I resoldered it and it somehow worked. Once I played something through it all I got was static. I looked at the PCB in Eagle and realized I had two signals between the receiver and DAC chip backwards. So I had to dig up the traces and solder on some wire. Such a pain. It then worked fine. I fixed it in Eagle and I am going to get new boards printed and order a whole new set of parts.

Yeah, stuff like that just happens. Not often to get everything right the first time smile.gif But it get's expensive for DIYing to have new boards manufactured all the time. guiltysmiley.gif
post #14 of 22
Thread Starter 
For the amount of stuff that I do, ~$22 for 3 boards isn't expensive. I just have nothing to do with the other 2 boards. If people wanted this DAC, then I would just get a whole run of them printed for $1/in² instead of $5/in².
 
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post #15 of 22
Quote:
Originally Posted by ramicio View Post

For the amount of stuff that I do, ~$22 for 3 boards isn't expensive. I just have nothing to do with the other 2 boards. If people wanted this DAC, then I would just get a whole run of them printed for $1/in² instead of $5/in².

That is very cheap for 3 nice gold plated boards, I guess I should start using those instead of being confident and getting 10 boards at a time biggrin.gif
post #16 of 22
Thread Starter 
Yeah, the quality is great. The only thing I'm not impressed with is the silkscreen alignment. Hopefully future boards I order will be better.
 
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post #17 of 22
Quote:
Originally Posted by ramicio View Post

Yeah, the quality is great. The only thing I'm not impressed with is the silkscreen alignment. Hopefully future boards I order will be better.

Personally I'm not too bothered about the silk screen (I do see it's a bit off on the pics you've posted), as long as the solder mask is precise. Would you get a choice of black masking for these? or is it always purple, a bit strange color in my opinion unless it's some brand kind of thing smile.gif
post #18 of 22
Thread Starter 
It's purple only.
 
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post #19 of 22
Forgot an important question, how do you find the sound quality of the Wolfson DAC?

I guess it saves the trouble of using opamps for the output, but I wonder if it's comparable to a solution using good quality dedicated opamps.
post #20 of 22
Quote:
Originally Posted by ramicio View Post

It's purple only.

That's too bad, I actually think I prefer the standard green compared to purple, but I think the matte black looks the best, especially with gold plating.
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