[Gta04-owner] 3D printed GTA04 case

[Boudewijn]

On Monday 02 January 2012 19:47:03 Lukas Märdian wrote:
> Hey!
> 
> I played a little bit with Blender 3D and the Neo 1973 CAD files (...) 
> and printed it via Shapeways.
> 
> Please have a look at my blog [1], where I described my effort and order
> this part at Shapeways [2], if you're interested.

It looks nice. How is the flexibility? I have been thinking about the buttons, 
which require most precision. Would you think this "White strong&flexible" 
material strong and flexible enough to make narrow "peninsula" (how to call 
it...) to press the buttons? 

I mean: instead of having seperate pieces for the two buttons, make them part 
of the body. Some 3 mm wide, 12 mm long, attached to the body at one narrow 
end and half a millimeter of spacing around the other edges. It does not do 
much to keep dust out; it results in two holes of 14 square mm.

I had a look at the material datasheet at Shapeways and the material 
descripton at EOS [1], but the descriptions are too general while I don't know 
how to use the specs in the datasheet to make an exact calculation myself. 

On a sidenote, whether in wood or in other materials, I thought of adding 
contact points for recharching in other ways than USB. Actually that would be 
to use it as VoIP handset, in a similar manner as DECT phones in a cradle. 
Obviously it is to be connected to TPS65950, but I do not really see where to 
connect it exactly. According to USB-OTG on page 81 of [2], 5V is connected to 
VBUS/R8, but I can't find that on OMAP power (p79) or Clock and Charger (p78, 
where I see POWER in the middle of the diagram at pins 7/8, connected to 
VAC/N5). Is it safe just to wire 5V to the USB-OTG connector and have recharge 
pads at the bottom of the case? 


Boudewijn

[1] http://www.eos.info/en/products/materials/materials-for-plastic-
systems/pa-22002201.html
[2] http://projects.goldelico.com/p/gta04-main/downloads/37/get/
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