Abstract: An educational mechatronics apparatus comprises a plurality of circuit boards respectively corresponding to blocks appearing on a block diagram of an automatic control system, the circuit boards being arranged along the direction of signal transfer, each of the circuit boards being provided with circuit components including input and output terminals and having a center area and opposite end portions, and a transparent protective plate covering the center area of the circuit board to inhibit a learner to touch the circuit components other than the input and output terminals located in the end portions of the circuit board. The input and output terminals located in the center portion of the circuit board are wired in advance of assembly of the apparatus, and the input and output terminals located in the end portions are adapted to be wired for learning by leads.