Introduction: Help on 3 Axis Stepper Controller
Hi, iḿ new to this DIY but iǘe built some of instructables stuff before, now i'm trying to build a 3 axis cnc. Found this simple controller to be connected to lpt port, but I need help identifying the three legged parts on the middle of the circuit, are those npn's? Resistors? What are thoe, can anyone point me out?
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.