Resumen
The development and the low cost of microcomputers introduced process control into a new era. Currently many analog and on-off controllers are being replaced by simple softwares. In this paper a simple and didactic process control experiment will be described. Basically it consists of the temperature control of equipment (an oven) using two microcomputers connected by their serial ports. Experiment features introduction of the practical side of the process control, using a distributed control system (DCS). It also allows the student to interact with the process and build the controller himself.