Seetrax XL Designer

A really valuable aspect of XLD is its hierarchical structure – it can represent a circuit with a symbol; it is a real systems thinking tool. For example, the circuit diagram for a relay and driver . . .

XLD Fig 12

Fig 12 Schematic of picXplorer relay module

. . . can be represented by a symbol or ‘block’.

XLD Fig 13

Fig 13 Symbol or ‘block’ of picXplorer relay module

By translating their picXplorer system (such as the one shown in the photograph above) into a block diagram (using a library file provided for them) . . .

Fig 14 'Block' diagrame of layout shown in fig 11

Fig 14 ‘Block’ diagrame of layout shown in fig 11

. . . students can design their pcb without worrying about the circuit diagram. (Of course, it is important for students to work with circuit diagrams and understand them. But we work with mixed ability groups and many students, possibly most at GCSE, do not develop a real understanding of circuit theory. The unfairness of controlled assessment is that it will prevent many students from achieving a working pcb unless the appropriate software is used.)

If the picXplorer file (or whatever library file used) is set up correctly, the power supply details will automatically be taken care of in the background. The circuit detail of each block is readily available for students to view.

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