Internal cutouts are allowed and supported. Draw them on your board outline layer.
If you're making your own boards or if you're using a cheaper factory like SeeedStudio that doesn't support slots then I think Retroplayer has the best idea.
QuoteIf you're making your own boards or if you're using a cheaper factory like SeeedStudio that doesn't support slots then I think Retroplayer has the best idea.attachment: seeedstudio made pcb
nope, its just as it arrived. looking at the brd/footprint it would be wrong, as there are only 2 circles used in it, but the product is just as i wanted it. maybe someone is looking over the files and alters the design. however i asked before sending the files if its ok and the dc jack is straight from the arduino reference."Can you accept "small" retangular slot for DC power jacks or should I convert them to big circular holes? Thanks.>the minimum plated slot hole is 0.8mm"or"Hello. Am I allowed to use overlapping plated-through holes for USB plug in my Sprint Layout project as shown in the picture?" >no problem, this is a good way to do plated-through slot hole.conclusion: they dont have issues with slots at all