This solution allows students to gain experience of fault finding on several analogue and digital systems. Students first learn how to use test equipment and test the major groups of active and passive components. Then students are given a fully working circuit so that they can understand the circuits' function. Supervisors then insert one of a number of faults on each circuit and the student must deduce the fault through the use of the appropriate instruments. Faulty components are clearly marked underneath the carrier. Five fully tested and assembled circuits supplied: one set is sufficient for 10 students working in rota.