SoNic_real_one said:
If there's enough interest, I will do another group buy. I need to order some more psu boards, though.
Oh, i want another groupbuy soon! (with full components will be great for guys like me that are outside USA) 😀
Help
OK it worked. And then it didn't.
When I first switched on it started playing music but at low volume levels as if the op-amps weren't working. Then suddenly it stopped playing as if a component had just failed. I checked the board and remembered that tant caps had a polarity.
C1,2,4,7,8,28,29 were reveresed. I have now replaced them but I still have silence. Question is what component have I likely fried. I suspect it might be the DAC. Is their any way I can check before I start trying to replace it.
OK it worked. And then it didn't.
When I first switched on it started playing music but at low volume levels as if the op-amps weren't working. Then suddenly it stopped playing as if a component had just failed. I checked the board and remembered that tant caps had a polarity.
C1,2,4,7,8,28,29 were reveresed. I have now replaced them but I still have silence. Question is what component have I likely fried. I suspect it might be the DAC. Is their any way I can check before I start trying to replace it.You may want to check if the regulators are ok. Do they get very hot to the touch when you turn the power on? Also, I think it may be better to take discussions of the DAC itself over to the "Digital" forum. I will resurrect my old ezDAC thread there for you.
I've checked the regulators with a multimeter and they seem OK. U8 gets warm, I wouldn't say very hot. I was going to check the voltage supervisor chip tonight when I get home. See what's doing.
I'm interested in the EZDac & EZdual power supply.
My only concern is mounting the surface mounted chips.
My only concern is mounting the surface mounted chips.
Count me in for 2 boards, when you - hopefully - opens the next groupbuy, please
Best regards
Knud
Best regards
Knud
I am interested in both the DAC and power supply.
Let me know if you would like me to help you set up a Wiki page.
Let me know if you would like me to help you set up a Wiki page.
grimberg said:
Thanks, for the offer! I'm interested, but what advantages would that have over my current website? Is it interactive or something? I've never really got into the whole wiki thing.
Wiki pages enable members to modify content. They are often used in group buys to gauge interest in the products being offered. Each forum member can update the Wiki page with his information and desired number of units.
For example: http://www.diyaudio.com/wiki/index.php?page=Input+Transformer+Group+Buy+
Wiki pages can also be used for collaborative content, like this guide to build the Krell KSA-50 clone:
http://www.diyaudio.com/wiki/index.php?page=Building+guide
For example: http://www.diyaudio.com/wiki/index.php?page=Input+Transformer+Group+Buy+
Wiki pages can also be used for collaborative content, like this guide to build the Krell KSA-50 clone:
http://www.diyaudio.com/wiki/index.php?page=Building+guide
Just to let everyone know that is ocnsidering this project it is fairly simple, I successfully built one last month and it was my first soldering project ever. (I only messed up once on the 28SSOP chip) ... that being said here are some of my lessons learned!
1.) Magnifying class - get a decent one, maybe a jewelers loupe to inspect the chips once you solder them down.
2.) Youtube has some really good videos on techniques for the 28SSOP packages (the smaller chips)
3.) Get 2 boards and a little over twice the number of materials if this is your first time as you may mess up and want to start over. I ended up using my second board and started over once I got the hang of it. Either that of buy a couple cheap 28SSOP packages and practice on something. Its cheaper to add on one extra resitor at 50cents then a a separate order plus shipping (trust me I know)
4.) Get a good soldering iron. I use a Weller WP35 (35 Watt) with an ST2 tip. The tip size should be no larger that 1mm. I sued that hole tip without changing on everything!
5.) Get a good flux pen and 91% Isopropyl alcohol to clean the board.
6.) Make sure you check the pitch sizes of some of the components as they are incorrect on the BOM. Double check the part number and description when you order!
If I think of more Ill post!
1.) Magnifying class - get a decent one, maybe a jewelers loupe to inspect the chips once you solder them down.
2.) Youtube has some really good videos on techniques for the 28SSOP packages (the smaller chips)
3.) Get 2 boards and a little over twice the number of materials if this is your first time as you may mess up and want to start over. I ended up using my second board and started over once I got the hang of it. Either that of buy a couple cheap 28SSOP packages and practice on something. Its cheaper to add on one extra resitor at 50cents then a a separate order plus shipping (trust me I know)
4.) Get a good soldering iron. I use a Weller WP35 (35 Watt) with an ST2 tip. The tip size should be no larger that 1mm. I sued that hole tip without changing on everything!
5.) Get a good flux pen and 91% Isopropyl alcohol to clean the board.
6.) Make sure you check the pitch sizes of some of the components as they are incorrect on the BOM. Double check the part number and description when you order!
If I think of more Ill post!
HaLo6 said:
Please do! You can even put your tips on the wiki, if you feel like it. And I would invite others to do the same.
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