The CL-1922 trainer is designed to provide students with a thorough knowledge of integrated, linear digital special circuits used in automotive electronic control systems. The experiments deal with sequential and combinational circuits, digital circuits, the operational amplifier (op-amp), special circuits and digital language. All the equipment needed to conduct the experiments are stored in a practical steel cabinet. The components used for the experiments are mounted on Moduponents® and can be rapidly fitted into their assembly housings according to the layout required for an upcoming experiment. The Moduponents® are interconnected by means of piggy back plugs.