Am 21.01.2012 14:40, schrieb gene heskett: > On Saturday, January 21, 2012 07:15:30 AM Fox Mulder did opine: > >> Am 21.01.2012 00:22, schrieb gene heskett: >>> Greetings all; >>> >>> I have thrown a schematic together, but before I commit to the >>> connector for the cable, which will need at least 5 conductors, GND, >>> Vcc5, A, B, Z signals and needs to be fairly compact, I am drawn to >>> the pcb mounted version of the RJ-11 connector. But sitting here, I >>> realized that although it is supposed to be a 6 pin connector, I have >>> never seen one with more than 4 positions populated, nor have I seen >>> The matching 6 wire cable. I considered the RJ-45 too, but have not >>> seen any pcb mount jacks in my neck of these woods. A db9 is just >>> plain too darned big unless the backshell is thrown in the corner. >> >> If you don't need too much current over the cable than RJ45 is a good >> connector. The pcb mounted connector should be available at most >> electronic shops and you can just use finished network cables to connect >> the device. >> But be sure to use network cables which are specified for 1000MBit >> because 10/100MBit only needs 4 wires and therefore many old cables >> won't have all the 8 wires. ;) >> >> Ciao, >> Rainer > > Any cat5 cable I've ever seen has 4 twisted pairs on this side of the pond. > This place has about 400 feet of cat5 strung about and its all just > 100mbit. I think the router I bought last summer can do a gigabit but I > don't believe either side of it is running that fast. > > I did find some crimp on 6 wire plugs at the shack last night, and some 25 > foot wall to phone cables but the only females were either in the usual 2" > square boxes or in line couplings, half of which were still too big if they > had been pried apart. So I settled on a 5 way inline with setscrews to > retain the wires. A lot easier to breadboard for testing too. Later last > night I fine tuned the .brd file a bit, finally figuring out how adjust a > hole so it didn't snap to the grid which because of that parts foot print I > had to set to 0.05 inches. > > But when I tried to run pcbgcode --config I think it was, I got a missing > drill.cfg (or something similar) so when I am awake next, I'll need to read > up on that. What I did read seems to indicate all drill holes are in the > same file regardless of size, and there is only one 'layer' for unplated > holes. I would have thought it would put each size of drill in its own > layer so that one could mount a given size drill, and run the output file > for that size of drill. Probably something I don't understand yet. The > only real problem I had with the board layout is that I had to repeatedly > ripup the individual nets by hand, all of them, before the auto function > would even try to fix things when I moved parts to actually fit the board > real estate I can use. Seems to me if there is a Drc error, it should do > an auto-ripup and start all over, but I didn't find that magic twanger to > do that. But I got it done, so its not a show stopper by any means.
I only wanted to say that the standard for 10/100MBit only uses 2 pairs and 1000MBit was the first to use all 4 pairs. But you are right that most cat5 cables used all 4 pairs way before 1000MBit over copper was available. But i have some old cables that still uses 2 pairs which could lead to an error for your case. :) It was pcb-gcode-setup.ulp but maybe it wraps around with --config. The drills are all in the same drill file. But for each new drill size a tool change code is inserted. So you could extract the code for each drill size into separate files or use the tool change command. To be honest i never liked the output of the auto-router and route all layouts by hand. The auto-router could be useful for complex layouts but not for simpler boards. Ciao, Rainer ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users