Computer parallel interface application model machine

Abstract

The utility model relates to an application mock-up of the computer parallel interface, aiming at overcoming the defects of the prior microcomputer experimental system such as complex structures, large power consuming, high cost, and other defects. The utility model adopts the technical proposal that: the front panel of the mold box (9) of the utility model comprises a bus data display panel (3) and a battery main switch (4); the back panel comprises a USB port (6), a parallel bus interface (8), a sensor input interface (5) and an analog output load interface (7); the upper panel comprises two input analog voltage meters (1) and an output analog voltage meter (2); the internal circuit board of the mold box (9) comprises the bus LED display circuit of the mock-up 1248, the AD switch input circuit of the mock-up, the DA switch output circuit of the mock-up and the power module circuit. The utility model has the advantages that the experiment design is novel; the advancement and generality of the technology are thoroughly considered when designed and studied. The utility model also has the advantages of being safe and power saving, having low cost, compact size and convenient and practical use.

Description

Technical field: [0001] The invention relates to an external device applied with a PC parallel interface, in particular to a model machine capable of directly applying the PC interface for experimental teaching and real-time closed-loop industrial control. technical background: [0002] At present, the equipment closest to the present invention is a microcomputer experiment system or trainer. This kind of equipment uses PCI bus or ISA bus, leads out the bus after expansion, connects some scattered PPI chips, etc., in order to build an experimental platform, and uses AC power to DC power supply. When this kind of equipment is used in teaching, the structure is complex, the power consumption is large, and the cost is high. It is only suitable for a single chip, and can only provide experimental learning for the bus, and cannot be directly applied to real-time closed-loop industrial control. Invention content: [0003] In order to overcome the shortcomings of the existing mi...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing microcomputer experiment system, such as complex structure, large power consumption, high cost, and inability to be directly applied to real-time closed-loop industrial control, the present invention provides a computer parallel interface application model machine, which includes a box body (9), a box The front panel of body (9) is composed of bus data display panel (3) and main power switch (4), and the rear panel is composed of USB interface (6), parallel bus interface (8), sensor input interface (5) and analog output load interface (7); the upper panel is composed of two input analog voltage display tables (1) and output analog voltage display table (2); the internal circuit board of the box body (9) is composed of the model machine 1248 bus LED display circuit and Composition of model machine AD conversion input circuit with oscillating circuit, model machine DA conversion output circuit and power module circuit

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