It looks like they use the optocouplers for inputs and possibly a level converter/buffer/inverting buffer for outputs. Find a good picture of the chip tops and look them up. That picture is not quite good enough. It will probably work fine. Some old laptop parallel ports I've stolen buffer chips from ran at 3.3v.
On Monday, February 26, 2018 at 4:30:25 PM UTC-5, Andrij Senyk wrote: > > Hello, > > I have this one mach3 interface board 5 axis > > https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwi25KzywsTZAhXKliwKHXBgAK0QjRx6BAgAEAY&url=https%3A%2F%2Fwww.aliexpress.com%2Fitem%2FCNC-5-Axis-With-Optocoupler-Adapter-Stepper-Motor-Driver-MACH3-Interface-Board%2F1975186212.html&psig=AOvVaw2ExyVfNS9tou9jF77cLINW&ust=1519766863377451 > > Its possible to connect to BBB without capes? That board have optocoupler. > -- 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+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
