I'm building my own Prusa i3 Mk3 and as many Einsy Rambo users, i'm having some trouble finding 5vdc fans, so i'm gonna make a small circuit to drive the 12v fans, looks like no one did this yet. But here comes the first problem: i'm a mechanical engineer and my electronic skills and balls aren't bit enough to try on a brand new Einsy Rambo. My idea comes from the ADM1028 datasheet as you can seeby andreas.ewt - Controllers