Seetrax XL Designer

Here is another example – a novelty money box in the shape of a frog. (The frog contains the electronics which is intended to sit on top of a larger container for holding the money). Coins put into the frog mouth are sensed by an infra-red reflective switch. In response, a PIC flashes bi-coloured LED eyes and plays a catching tune (Paul McCartneys ‘We all stand together’ – the frog chorus!)

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Fig 27 Money box schematic (in block diagram form)

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Fig 28 Details of the reflective-opto sensor block

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Fig 29 Details of the tri-colour LED block

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Fig 30 Details of the speaker block

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Fig 31 Details of the PIC block which includes of the programming connector and power supply components

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Fig 32 PCB designed to fit a frog shaped enclosure

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Fig 33 PCB design exported to pro|ENGINEER as a 3D DXF file. (XLD also supports IDF3 file export)

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Fig 34 ‘Sketch’ of PCB outline

The sketch of the PCB outline is created using the imported DXF  . . .

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Fig 35 pro|ENGINEER ‘Use’ button

. . . with the ‘Use’ button.

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Fig 36 Frog enclosure assembly of three parts (lid, centre and base). The organic shape has been created using warping and variable section sweeps.

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Fig 37 Frog assembly showing location of electronics

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Fig 38 Frog vacuum forming moulds being cut using an MDX40 3-axis router (from pro|ENGINEER stl file)

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Fig 38 Vacuum formed base shown alongside its mould. Notice its webbed legs!

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Fig 40 PCB fitted into vacuum formed base

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