This document presents a proposal for the teaching of physics in which the construction of measuring equipment is used to allow teachers and students to acquire a vision of physics where the interdependence between theory and experimentation and the importance of collective construction are recognized. In order to know the conceptions of the participants, an ethnographic methodology is used and the discussion group is used as an instrument for data collection. It is proposed to build a photoport and a spectrometer, both of low cost, to join them to the freeware PhysicsSensor and perform measurements.