I will check out the config files. Are you running the BBB on a Comet? How 
much are you asking for the boards?
Harley

On Thursday, January 12, 2017 at 8:08:18 PM UTC-8, Ralph Stirling wrote:
>
> It was such a simple design that I didn't bother with a BOM.
> I started with the Probotix config files, but can't guarantee
> that my board is still completely compatible with the PBX-BB.
> The "engr480a" hal and ini files work with my board.
>
> -- Ralph
>
> On Thursday, January 12, 2017 at 11:20:27 AM UTC-8, Harley Engholm wrote:
>>
>> Do you have a BOM for the board and will the configuration files for 
>> Comet_NP for the PBC BB work and how much for the PCB? Looks like a good, 
>> simple setup.
>> Harley 
>>
>> On Thursday, January 12, 2017 at 10:43:44 AM UTC-8, Ralph Stirling wrote:
>>>
>>> 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
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