I made one mistake on the (hasty) board layout I did, which requires pullup resistors to be added to the digital input pins at the BBB headers, but otherwise they did the job for me. They are nothing fancy. You can look at my documentation at: http://gab.wallawalla.edu/~ralph.stirling/misc/bbbcape to see if you are still interested in a blank board.
-- Ralph On Thursday, January 12, 2017 at 10:36:44 AM UTC-8, Harley Engholm wrote: > > Have the boards you had made worked well for a probotix type setup? I have > a V90 and an asteroid and am now working on a diy engraver that I want to > use the BBB on. Finding capes for CNC only instead of 3D printer setups has > been a challenge. I would be especially interested in your board since it > seems you are working on the same type of equipment. I contacted Len and he > said the new version of the PBX BB won't be available for at least a couple > of months. > Harley > > On Sunday, September 18, 2016 at 10:24:39 AM UTC-7, Ralph Stirling wrote: >> >> Not finding anything available that I liked, I have designed a simple >> cape myself >> and will be getting a batch fabricated this week. Would anybody on the >> list be >> interested in buying a bare board for $15 each (+ shipping if outside US)? >> >> I use a cheap LM2596 dc-dc converter module off ebay for powering >> everything, >> and Toshiba TBD62083 drivers to provide protection for the BBB. These are >> open-collector, so loads need to be +V referenced. The +V can be 5-24V. >> The >> step/dir signals are intended to drive 5v inputs, but the GP outputs are >> intended >> for 24v loads (but can switch lower voltages fine). The inputs are 24v >> capable. >> >> I designed it to work with the Probotix Comet configuration (as I already >> have a >> PBX-BB board) for step/dir and home/limit connections. The general >> purpose >> outputs will need additions to the hal file. >> >> -- Ralph >> >> On Thursday, September 15, 2016 at 8:38:15 PM UTC-7, Ralph Stirling wrote: >>> >>> I came across this oddity while poking around this evening: >>> >>> http://www.waveshare.com/CAPE-for-Arduino.htm >>> >>> The price is right, the claims sound good, but how does this >>> thing handle 5V arduino peripherals without any active (or >>> passive for that matter) circuitry? The schematic just shows >>> the arduino sockets connected to BBB pins through selectively >>> stuffed 0 ohm resistors. Looks like a good way to burn up a >>> BBB. Am I missing something? Back to my Kicad session... >>> >>> >>> On Thursday, September 15, 2016 at 6:35:24 PM UTC-7, Dave Cole wrote: >>>> >>>> I was in a plant where they make a large number of boards on multiple >>>> lines and I looked at their automatic test fixtures that probe the >>>> boards... and all of them were wire wrapped! So maybe not "that" retro! >>>> >>>> :-) >>>> >>>> Dave >>>> >>>> On 9/15/2016 8:28 PM, Ralph Stirling wrote: >>>> >>>> You would have to suggest hand wiring :-). The proto capes I've seen >>>> don't look big >>>> enough for the dip buffer chips and connectors, but I'll look at that >>>> option a little bit more. >>>> I guess I could use generic perf board material while I'm at it. I >>>> wonder if I have enough >>>> wire-wrap sockets and wire to go really retro? >>>> >>>> On Thursday, September 15, 2016 at 5:09:09 PM UTC-7, Charles >>>> Steinkuehler wrote: >>>>> >>>>> On 9/15/2016 5:27 PM, Ralph Stirling wrote: >>>>> > I have decided to use Machinekit running on BBB's in my >>>>> Manufacturing Systems >>>>> > course for >>>>> > senior ME students. I've been using old PC's running Linuxcnc the >>>>> past several >>>>> > years, and >>>>> > the old PC's have been failing. They also take up a lot of space in >>>>> the lab. >>>>> > I've got one >>>>> > Probotix PBX-BB cape, which is perfect for my needs, but Len is out >>>>> of stock on >>>>> > them, and >>>>> > won't have any before his design revision in 3-4 months. I have >>>>> external >>>>> > stepper drivers. >>>>> > >>>>> > Does anybody know of any capes that aren't already featured in the >>>>> wiki? I've >>>>> > looked at >>>>> > all of those, and they are either too expensive, unavailable, or too >>>>> fancy. I >>>>> > just need 3 or >>>>> > 4 channels of buffered step/dir, buffered home inputs, and a few >>>>> gpio's. I've >>>>> > got a design >>>>> > of my own underway, but only have about 3 weeks until I need to have >>>>> these >>>>> > running, and >>>>> > don't think I can pull off my custom design in that time. I need >>>>> eight or nine >>>>> > boards. >>>>> >>>>> You could build your own manually using a prototype cape and a few >>>>> through-hole buffer chips. It sucks soldering 8-9 boards up by hand >>>>> with "flying wires", but it shouldn't take more than a few hours if >>>>> you're decent with a soldering iron and have the right tools (a good >>>>> set of diagonal cutting pliers and a nice wire stripper). >>>>> >>>>> -- >>>>> Charles Steinkuehler >>>>> cha...@steinkuehler.net >>>>> >>>> -- >>>> website: http://www.machinekit.io blog: http://blog.machinekit.io >>>> github: https://github.com/machinekit >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Machinekit" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to machinekit+...@googlegroups.com. >>>> Visit this group at https://groups.google.com/group/machinekit. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. 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