Sorry I forgot to check the forum for a couple of days and didn’t see your new post. I think the vias are a good way to define holes. In fact, that is how I do mounting holes in my boards.
The packages for the TI chips look good. I remember having to play with some library components in Eagle to get fine pitch ICs to meet the 10mil rules. Mostly changing pad sizes. Fortunately you are not working with chips so fine that it is impossible to do.
If you are not able to get all of your clearances to 10mil, PCBFabExpress should be able to handle it. Their process has improved since the last time I ordered from them, and they now claim to be able to do 6mil clearances in their standard process. Still, I never like to push a process to the limit, and a conservative design is less likely to have manufacturing defects.
I believe I had all of the clearances up to 10. The only cases that I relaxed to 9 was pad to line as there were areas where the connection into a pad, it complained about the next pad, even though I went in straight on the pad next to it…
Do you have an example submission package for them that I can model mine after?
Thanks again
Kurt
Update: I changed the 9 to 10, had 4 errors, two were simple, move the trace up. The last two turned out that it looked like trace went directly into pad, which it did, but then there were some zig zags inside the pad, which probably did not hurt anything but the verification. I deleted those areas and reran that last segment of the etch and no error now. Generated new Gerber files, re-ran viewmate and their DFM and got no errors or warning, until silkscreen warnings about width of the strokes…
Since I am an ignoramus and couldn’t figure out how to attach a file to my post, I will email the example files to Jim, who I’m sure will either forward to you or attach here.
I am sending a zip file with the gerbers, excellon drill file, readme, and fabrication print. I am also sending the Corel source for the fab print, but you could create it in any program you want.
Mike: If you tried attaching your files from the quick reply, well, you can’t do that - you’d have to click on the “Full Reply” button. But even if you tried attaching those from the full reply page, .cdr files weren’t allowed. Sorry about that! I’ve added that extension to the “allowed” list now. bc_mio_20.zip (86.2 KB) bc_mio_20 Fab Print.cdr (14.8 KB)
Looking at the PCFabexpress website it looks like the boards should ship out tomorrow There was a delay at the start of the process as their checking program found that two vias had a 5 mil clearance. What was interesting is that neither of the verifications I ran found them (I had the check in the diptrace set to something like 12-15mil for via to via and it did not find an issue. Nor did viewmate. But PCFabexpress sent me some pictures show which ones they had issues with and it was easy to move them to take care of it…
Just got off the phone with Ken Gracey at Parallax. They will be assembling the boards. I will need the BOM so he can see if there are any parts they don’t have in stock. This is pretty cool eh? 8)
Sounds great. I will put together the list in the next day or so. Been playing around building shed for Chickens… Plus needing we are planning to build a new deck and working on getting the engineer setup plus permits…
Sounds fun. Will also need the parts placement diagram.
Don’t feed your chickens corn! Make sure there is no corn filler in the feed. Humans should not eat corn, or animals that eat corn. Has to do with omega 3 vs. omega 6 fatty acids. Omega 6 is bad and omega 3 is good. The body likes a 1:1 to 4:1 ratio. Corn is unique as the ratio is 45 to 1 bad to good. This is not a diet fad, but scientific fact.
I will pass the suggestions about corn to my wife… She won’t get any chicks until next month. But it will still take me awhile to complete the 8x10 building. Finished siding yesterday, may work on roof today…
Started working on parts list and the like. What I am wondering is on certain type parts, should I look up some part number or they should be able to figure out. Example: 1x4 .1" male connector pins. I have mapped them to some Jameco part numbers, but I am not sure if they wish to use their own or if they would rather use mostly 1x3… I have not yet mapped resistors and most of the 0805 type capacitors to part numbers yet and still need to look up USB connector… But I have a start below…
What do they need for a placement diagram? Do they simply want drawing. Or do they want something like Part X, pin 1 at X,Y orientation…
Update: The boards should be delivered today. Hopefully I Will make it into town today to pick them up… Cost I believe was: $75 + $15 shipping… As for check, probably no need maybe something like a T-Hex would work great!
For parts list I have updated the XLS file with more of the data… It might help if you have a parts list for either the BB2 or SSC-32, so I can double check and grab part numbers for things like which LEDS you used and the like. I put in some Jameco part numbers for 1x4 headers and the like, plus things like SMD resistors and capacitors… I put some in here, but not sure if they help or if they simply want to know [0805 capacitor .1uf]…
I’ll attach/send the BOM for the BB2 or similar board tonight. I have manufacturer’s part numbers and Digi-Key stock numbers for most components. Of course my list is a few years old so the parts might have been discontinued/replaced. But it will be a good starting point. I am confident that the actual boards are not built with the exact components I specified anyway, just form-fit-function compatible parts.
Watch diode D5 (which I assume is the diode for the speaker circuit). You have an 0805 footprint, and I don’t think that is the footprint for the diode I used (but I suspect the diode I use will fit, especially for a prototype).
Thanks, I am currently working with Mikes list to update parts list. Found a few differences like I sized for 0805 LEDS and he used 1206. The same manufacturer has them so should work for first pass…
There was a delay at the start of the process as their checking program found that two vias had a 5 mil clearance. What was interesting is that neither of the verifications I ran found them (I had the check in the diptrace set to something like 12-15mil for via to via and it did not find an issue. Nor did viewmate. But PCFabexpress sent me some pictures show which ones they had issues with and it was easy to move them to take care of it…
I will need the BOM so he can see if there are any parts they don’t have in stock. This is pretty cool eh? 8)
