| GitHub96 | [flickernoise] xiangfu pushed 1 new commit to master: http://git.io/DZ9wmA | 03:47 |
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| GitHub96 | [flickernoise/master] simple mode: enable LEFT/RIGHT for previous/ next patch - Xiangfu | 03:47 |
| lekernel | http://fabricatorz.com/2012/03/new-milkymist-action-shots/ | 12:44 |
| kristianpaul | yeah, nice video | 13:33 |
| Hodapp | that is cool | 13:35 |
| jonand | hello. Is the milkymist one rc3 pcb stackup available somewhere or do I have to install altium to find out? | 13:41 |
| wolfspraul | we talked about that recently | 13:41 |
| jonand | I'd like to run some SI simulations on the pcb | 13:41 |
| wolfspraul | there is a utility gerbv that allows you a view into the layers | 13:41 |
| jonand | I've viewed the gerbers but there is no stackup drawing in there | 13:42 |
| wolfspraul | what do you mean with stackup drawing? | 13:42 |
| jonand | stackup as in layer and fr4 thickness | 13:42 |
| wolfspraul | that's just a few numbers, right? | 13:42 |
| jonand | stackup example: http://www.polarinstruments.com/products/stackup/Speedstack.html | 13:43 |
| jonand | yes | 13:43 |
| jonand | I could expect the microstrips on the outer layers to be 50ohms until someone corrects me.. :) | 13:44 |
| wolfspraul | too bad Adam is already in a 1.5 day mini vacation / public holiday | 13:44 |
| wolfspraul | I have no Altium either and wouldn't even know where to look | 13:44 |
| wolfspraul | but we'll find this out, definitely | 13:45 |
| jonand | It should be in the pcb manufacturing archive to avoid getting completely different stackups for each order.. | 13:47 |
| wpwrak | wolfspraul: if you have the production order sent to the PCB house, that would probably have it | 13:50 |
| wolfspraul | we have no local storage, so it must be somewhere | 13:57 |
| wolfspraul | unfortunately the altium files may be the only place, it's possible that they were sent to the pcb maker and they read the stackup data directly from there? | 14:01 |
| wolfspraul | is the stackup data not in the gerber standard, or just not in our gerber files? | 14:06 |
| wolfspraul | this is a good discovery already :-) (that it's missing...) | 14:06 |
| wpwrak | i think it's usually a text document that is sent along with the order | 14:18 |
| wpwrak | at least the ones i saw this far (not many, though) were of that kind | 14:18 |
| wpwrak | altium may or may not be able to carry this sort of information | 14:19 |
| wpwrak | this looks like a start: http://en.qi-hardware.com/wiki/Milkymist_One_RC3_PCB_Specification | 14:22 |
| wpwrak | this one, on the other hand, is useless: http://en.qi-hardware.com/wiki/PCB_Fabrication_Technical_Information | 14:23 |
| wpwrak | ah wait, it's a checklist not a spec. okay, then it has some use | 14:24 |
| wpwrak | the rc3 pcb spec looks good, though | 14:27 |
| wpwrak | jonand: does it have enough of the parameters you need ? | 14:28 |
| lekernel | so, visikord "launched" at ces2012 and it sounds familiar. https://www.google.com/search?ix=seb&sourceid=chrome&ie=UTF-8&q=ces+2012+visikord | 18:10 |
| lekernel | conclusion: expensive booths and nice demo videos probably won't work for MM, either | 18:11 |
| lekernel | http://www.youtube.com/watch?v=1FWROIIrNLs => 665 views ... | 18:13 |
| lekernel | they even have nicer effects (but with more latency) | 18:14 |
| jonand | wpwrak: that will do, thanks | 19:41 |
| wpwrak | yeah, latency kinda sucks :) | 19:54 |
| wpwrak | we really need some video response effects, though | 19:55 |
| lekernel | like the visikord "triggers"? yeah... | 19:56 |
| wpwrak | yup | 19:56 |
| lekernel | what about this target for the next release: triggers + ffmpeg + worst USB bugs fixed? | 19:56 |
| wpwrak | so .. in 2008, people are still remixing "self control". amazing ;-) | 19:57 |
| wolfspraul | wpwrak: [pcb stackup] adam will give us a definitive answer, but he's only back tomorrow (Friday) | 23:15 |
| wolfspraul | today is a public holiday in Taiwan | 23:16 |
| wolfspraul | but it's a really neat little piece of information, I had no idea about 'pcb stackup' :-) | 23:16 |
| wolfspraul | I thought all this must be in the gerbers, but of course we all know the often many-page long checklists when ordering pcbs, so it looks like the gerber format is not really powerful enough in a lot of details | 23:17 |
| wpwrak | naw, gerber is very primitive. it's just the traces. doesn't even have drill information (diameter). | 23:22 |
| wolfspraul | yeah | 23:23 |
| wolfspraul | even so it's so old and widely used, so one would think it can be amended... | 23:23 |
| wpwrak | oh, i'm sure there are many "enhanced" versions of it ;-) | 23:24 |
| wolfspraul | I mean standards | 23:24 |
| wpwrak | hmm, does .doc count ? :) | 23:25 |
| --- Thu Mar 29 2012 | 00:00 | |
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