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Post by Deleted on Sept 16, 2011 0:20:04 GMT
Stable Working Board
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Post by Deleted on Sept 16, 2011 1:03:09 GMT
Alan Nice work. Have you built a 3.3V version yet, or tried this one at 3.3V under load ? Regards Alex
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Post by Deleted on Oct 4, 2011 14:07:16 GMT
Hi All Just a quick note the boards have arrived :-/the boards have arrived :-/the boards have arrived for the second round prototype build of Will' Sabre DAC so get the irons hot take care
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Post by Deleted on Oct 4, 2011 15:39:14 GMT
Hi Shaun, will I plug mine in now? ?
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Post by Deleted on Oct 10, 2011 21:06:21 GMT
Hi Shaun, will I plug mine in now? ? Hi Alan good news as you will have something to work on within the next few days. take care good news gentlemen the boards and components have shipped. let me know when you have them. take care
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jonclancy
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Post by jonclancy on Oct 11, 2011 9:26:46 GMT
Shaun, many thanks for running this!!! If anyone needs a hand with the SMD soldering, I'm happy to help. SabreI'm not offering an assembly service, though!
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jonclancy
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Post by jonclancy on Oct 11, 2011 9:31:41 GMT
Guess what just arrived in the post???!!!!
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Post by Deleted on Oct 11, 2011 10:00:13 GMT
Guess what just arrived in the post???!!!! Mine too, thanks Shaun. Syd
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Post by Deleted on Oct 11, 2011 22:36:52 GMT
Guess what just arrived in the post???!!!! Mine too, thanks Shaun. Syd Hi Syd/Jon Great news Guys Jon i have 30 boards for you to make a start on sooooo one a day is the well balance way. thanks for the offer of help with the SMD stuff it's really reassuring to know that help is there IF NEEDED. take care
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leo
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Post by leo on Oct 11, 2011 22:45:15 GMT
I've only just got home but there was a little package waiting for me, many thanks Shaun I'll also do my best to help if needed, smd can be a PITA but this project is a great way to get you started, the WM8804 will probably be the most fiddly
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Post by Deleted on Oct 11, 2011 23:08:43 GMT
I've only just got home but there was a little package waiting for me, many thanks Shaun I'll also do my best to help if needed, smd can be a PITA but this project is a great way to get you started, the WM8804 will probably be the most fiddly Hi Leo YES i shuddered when i saw that WM beasty with all of those skinny legs. I'm glad that you received the parcel in good order. it may have proved embarrassing after my remarks on another thread about inadequate packaging. so that seems to be most of the Home Guard sorted just the International Brigade to report in now. thanks for the offer of help SMD wise I'll send you the other 30 boards. take care
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Post by Deleted on Oct 11, 2011 23:32:00 GMT
Hi Shaun, as you know my package arrived this morning and gave me the jitters...............can't see any resistors..............did you pack any? ....OH!! wait now what's these strips of paper...shades of "LSD"....ah!! come on now whos pulling my leg do you really think my eyes are that good. Naw Shaun only kidding lets have a good stab at this SMD malarkey and do Will proud. Attached photo of the ready to go final version PSU 3.3v all four of them.
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Post by Deleted on Oct 11, 2011 23:55:05 GMT
Hi Alan Nice work . Are the main electros in the JLH section, low ESR or standard types ? If they are low ESR types you shouldn't need the greencaps, as it may "sharpen" the sound a little too much.Good luck with fitting those SMD resistors ! Regards Alex P.S. I have probably hinted at it before, but some may REALLY appreciate a combined PCB layout by Will when he finds time to scratch himself.They would have plenty of other uses too.
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Post by Deleted on Oct 12, 2011 7:53:57 GMT
Hi Shaun, as you know my package arrived this morning and gave me the jitters...............can't see any resistors..............did you pack any? ....OH!! wait now what's these strips of paper...shades of "LSD"....ah!! come on now whos pulling my leg do you really think my eyes are that good. Naw Shaun only kidding lets have a good stab at this SMD malarkey and do Will proud. Attached photo of the ready to go final version PSU 3.3v all four of them. Hi Alan Nice work yes those SMD resistors are pretty tiny but a 10x loop and desk top magnifier should help with that. failing that trinoculars should do the trick. myself I've hired the Hubble telescope for a few days. ;D when i received the resistors i thought that Farnell had sent rolls of microfilm by mistake. it's my first time with SMD also so it should be fun. a question on what order to solder the components to the board. it's my understanding that in unlike populating a ''normal'' size board we start with the large components and word down to the smallest. have i got that right or is it going to end in tantrums and tears doing things that way? I'm going to be taking my time a little with this one as it's all so new. so onwards and upwards Alan and just remember the words of BO ''yes we can'' take care
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Post by Deleted on Oct 12, 2011 8:47:56 GMT
Hi Shaun, I'd say the reverse would be a better way to go, depending on the board of course. I'll be inserting smallest first.....gives more room for fumbling fingers especially if larger components overshadow the smaller. Then the multi leg spider ones and so on up....it's all a big learning curve for me and all the more enjoyable for it. Regards Alan
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Post by Deleted on Oct 12, 2011 9:07:06 GMT
Sounds like a plan to me .
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Post by Deleted on Oct 12, 2011 9:14:11 GMT
Hi Alex, thanks for the input so you reckon I should pull the .1's then
Capacitors are Panasonic 4700uf 10v ESR 0.013Ω
I've only ever used one SMD component and that was about five years back. I purchased it by mistake not knowing there were such things......quite funny actually, when I opened the pack there was nothing in it.....well no, not quite nothing just a small black dot like thing with glints of silver at the edges. After I sussed it out I soldered it in and glory be the thing worked.....so despite all the noises being made about SMD I'm quietly confident. Take care, Alan
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Post by Deleted on Oct 12, 2011 9:33:48 GMT
Hi Alan I can relate to the part about larger components overshadowing the smaller. Alex
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Post by Deleted on Oct 12, 2011 11:30:11 GMT
Wonder what the context was Mmmmm! mabey not
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Spirit
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Post by Spirit on Oct 12, 2011 13:42:45 GMT
I'll have three weeks after exams before I head off to India for 2 months. Looking forward to putting a couple of these together Thankfully I have a mate who's competent with SMD...
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Post by Deleted on Oct 12, 2011 16:14:28 GMT
Hi Shaun, I'd say the reverse would be a better way to go, depending on the board of course. I'll be inserting smallest first.....gives more room for fumbling fingers especially if larger components overshadow the smaller. Then the multi leg spider ones and so on up....it's all a big learning curve for me and all the more enjoyable for it. Regards Alan Hi Alan naaaa I'm talking about putting the SMD chips on first and then the SMD resistors. when that's done then the through hole components. I'm thinking that the chips are going to require the most room around them to swing the iron. ;)which is what i should have said back there. ;D i was thinking that no one in their right mind would put the through holes in first.but i guess that i should have been more specific. just a thought take care
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leo
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Post by leo on Oct 12, 2011 17:27:04 GMT
If you think those resistors are small you should see how small the caps are I'm going to attempt soldering onto the dac chip pins for decoupling When time allows to start on the dac board I'll take plenty of pics. Don't get as much free time lately for the old diy I'd personally do the IC's first after tinning the pcb pads, just take your time, not too much heat. I tend to put a small piece of sticky tape on each end of the IC to the pcb to hold into place. I then solder one leg on each corner of the IC to start with. I then go over the legs with a flux pen and gently do the other legs. Get yourself a roll of desolder wick, it allows easily removal of solder shorts. If your like me and only have crappy ROHS solder its worth getting a flux pen. A pair of fine nose tweezers also come in handy. My eyes have started getting s**t now so will probably need a magnifying glass too
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leo
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Post by leo on Oct 12, 2011 17:41:35 GMT
I've only just got home but there was a little package waiting for me, many thanks Shaun I'll also do my best to help if needed, smd can be a PITA but this project is a great way to get you started, the WM8804 will probably be the most fiddly Hi Leo YES i shuddered when i saw that WM beasty with all of those skinny legs. I'm glad that you received the parcel in good order. it may have proved embarrassing after my remarks on another thread about inadequate packaging. so that seems to be most of the Home Guard sorted just the International Brigade to report in now. thanks for the offer of help SMD wise I'll send you the other 30 boards. take care It arrived fine ta, packaging was spot on and going to the trouble of writing on the values of the parts bags was a help for my crappy eyesight. It would take me month's to do 30 boards Its a shame we don't know somebody with one of those SMD ovens, doing it all by hand is much more time consuming. Seriously though I think this is an ideal project to get folks started with SMD, it should get their confidence up after doing a few parts, lets see how things go. At least theres a few of us willing to help those that are really struggling just incase.
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Post by Deleted on Oct 12, 2011 17:59:06 GMT
Hi Leo, I'll look forward to the pics I'm sure they will help us a lot....I was intending to tin the pads first so your comment confirms where I was going also have to get the flux pen...I take it that you would run the flux pen over the IC's legs first then tape down and fix each corner. This project will be a straight after breakfast affair whilst my eyes are at their best. I'm looking at magnifiers on Ebay has anyone tried the A4 fresnel lens type, you could make up a nice frame to work under with that.....pretty cheap so I might just suck it and see. Alan
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Post by Deleted on Oct 12, 2011 18:05:07 GMT
Hi Shaun, there'l still be plenty room to swing a cat when the resistors are laid I doubt you'll even know they'r there. Alan
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