Process control kits: a hardware and software resource

We have developed inexpensive and flexible process control kits including both hardware and software that allow students to design, implement and test their own control systems in the classroom. Each kit requires approximately $1200 in parts not including a personal computer for the control system. The kits use the LEGOreg RCX brick for A/D and D/A conversion and some distributed computing tasks. Students construct simple processes using quick release "instant fittings" and the kit\´s process, sensor and control components. The process is controlled by an application written in ROBOLABtrade for LabVIEWtrade. Students are able to carry out a range of level, flow and temperature control experiments. Using two kits multivariable control experiments can be carried out. In addition, the kit is capable of sequence logic control. Student response to the Lego kit has been positive during the first three semesters of its use