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The case was developed along the lines of the acrylic
casebuilding tutorial here. Having the button outrigger
makes sanding a little trickier, but it is still doable.
It turns out that some customers really don't like using
anything but primary batteries, so I designed a special case
just for them, based on the original Hollybook design.
Two versions of the H2 were made:
In both versions, we milled out some pockets in the back plate
to accomodate some of the components on the gumstix. This
allowed the overall case thickness to be a low as possible, at
the expense of adding another operation. There is also some
yield loss when milling away 1mm of a 1.5mm acrylic sheet,
fixtured in place with double sided tape.
The main part of the case ended up being 7.5mm thick. This
could be reduced by replacing front, back, or both sheets with
titanium.
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H2 Back View (Li model)
H2 Top View (Li model)
H2 Front View (Li model)
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This model has a main body which is the same dimensions as the
Li model, but has an aluminum tube mounted to the button side
of the case. This tube accomodates 3 AAA cells, for those
designers that hate rechargeable batteries.
The tube was machined with threads in the top and bottom,
which accept threaded brass and nylon plugs. The tube was
glued and screwed into the core piece of the case, with tiny
hardware. Wire wrap wire and copper tape were used to make the
terminal connections and bring them to the main board.
Alkaline
Model
Back
View
Edge
View
Ready to
Ship
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Design partially original and partially ripped off from other websites
by Holly Gates
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