hey guys how u doin hope u guys are good.i have to do a project with a siemens s7-200 PLC.i decided i want to build a 2 speed garage controller.i just wanted to know wats the cheapest sensors i can use with this contoller and how to interface it?
What is a "2 speed garage controller"? The only thing that moves on most garages is the doors. Do you you mean an opener for two doors ? Or one door that can travel at two speeds? What type of sensors are you talking about?