Intro: 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?