Inversus is a digital interactive installation that explores the relationship between user actions with common objects: lamps, speakers and fans. It is an interactive machine that shifts the conceptual understanding a user traditionally has about a specific object, making people wonder: why should a lamp be used only to illuminate? In fact, lamps, speakers or fans are commonly used as output interfaces, imagine now, what would happen if we turn the output into an input interface? This machine explores an inversion on this relationship by using lamps as light sensors, speakers as pressure sensors and fans as blowing sensors.