hi peeps, as usual im not sure if this is the right place to be looking for this but im sure someone can point me in the right direction. i bought myself a cheap Chinese laser engraver from eblag, the control module is just a nano with a couple of a4988 stepper drivers, it was one of those diy kits so after building it up i ran a few bits to see how well it would work and to check some of the settings, the steps were really visible so i thought i could just hook up the jumpers i didnt see in the packaging and then go to 1/16 stepping, having removed the a4988 there isnt any jumpers, so instead i swapped the whole thing for an uno with a cnc shield and drv8825's that i had spare, so now i have this spare board that needs a few tweeks. im not so concerned with the micro stepping mods, ill just bring the right pins high and that should be that, might use dip switches, anyway, what i was more interested in was what pins were unused on the nano so they could be used for end stop input or other things so that the board can be used as a control for moving the x and y axis on a small mill, more for positioning than anything else, maybe even some power feed applications. dont suppose anyone here has a pin out for this kind of module
any help is as usual gratefully received.