摘要：The recent rapid development of electronics and continual increase of the complexity and variety of electronic circuits (chips, packets, micro- and embedded systems) creates a demand for viable test and diagnostic methods. These recent developments have led to a great deal of research interest in electronic diagnostic systems, especially of effective diagnosis methods of detection, localization and identification levels of hard (catastrophic) and soft (parametric) faults in analog circuits. At present, the majority of electronic devices (embedded systems) are designed based on digital circuits;however a lot of them also contain analog components that require more complicated testing techniques. This paper presents a novel, electronic components tester board with inside, outside of circuit under tested. The design is first simulated by using the electronic work-bench software Multisim 11 in order to obtain satisfactory theoretical results for each standalone element of the design. Thereafter, the design is practically implemented and experimentally verified to show agreement with the simulated results.

摘要：The design and implementation of a classical control system laboratory based on PLC control system is introduced in this paper. To design and implement the system, two parts must be produced. The first is software for PLC and the second is hardware for experiments related to the programs. The PLC control system used in the design is LS industrial system company GM7-DR40A 24/16 Digital I/O and single Analog I/O module, two photoelectric sensors from Atonic company’: the first with the model BR100-DDT-P, and the second BEN10M-TFR. An approximate sensor with 5-sides is detected, four of CMOS BCD-7-Segment driven by CD4511B, two relays: 2-poles and 3-poles, six voltages and an ammeter measurement, DC motor and 24 VDC power supply and many connecters and pinions. Satisfactory results are obtained by executing twenty four experiments for classical control theory that fulfill the requirements of control theory in undergraduate stage and replace the old experiments executed by PID controller where the practice system is implemented by PLC control now.