Thanks! I wouldnt know how to make a linear actuator myself, but are you saying that i need a limit switch even if I buy one linear actuator already made? If my starting point is a close vent, cant I just program to open at full lenght (let's say 100mm) and then at a diff temp trigger to close to the initial position?
Sorry the basic question. Dont event know what a limit switch is, but I suppose is a mechanical device that sends and off/on signal when something (the vent) presses it?
Cheers