Werner Almesberger
2016-04-12 12:42:58 UTC
In http://lists.en.qi-hardware.com/pipermail/discussion/2016-March/011019.html
I calculated/guessed the length of the contacts (i.e., the distance
between rear and battery) as 2.04 mm for Keystone 5225 and 2.54 mm
for Keystone 5203.
With a nominal battery size of 43.9 mm (+/- 0.6 mm) this yields a
total length for battery with contacts of 48.48 mm.
I wrote "calculated/guessed" since the drawings of the contacts
don't indicate the position relative to the battery (or relative
to each other).
But I now found this information on in the catalog:
http://www.keyelco.com/userAssets/file/Keystone-CatalogM65.pdf
Catalog page 37, PDF page 43.
They suggest a spacing of 49.5 mm, about 1 mm + tolerance more than
what I had. If we assume a tolerance of 2 * 0.1 mm, the case will
thus have to grow to a total width of at least 53.7 mm.
Since I'll have to stretch it to at least 54.0 mm to accommodate
the mechanical buttons anyway, this fits quite nicely.
- Werner
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I calculated/guessed the length of the contacts (i.e., the distance
between rear and battery) as 2.04 mm for Keystone 5225 and 2.54 mm
for Keystone 5203.
With a nominal battery size of 43.9 mm (+/- 0.6 mm) this yields a
total length for battery with contacts of 48.48 mm.
I wrote "calculated/guessed" since the drawings of the contacts
don't indicate the position relative to the battery (or relative
to each other).
But I now found this information on in the catalog:
http://www.keyelco.com/userAssets/file/Keystone-CatalogM65.pdf
Catalog page 37, PDF page 43.
They suggest a spacing of 49.5 mm, about 1 mm + tolerance more than
what I had. If we assume a tolerance of 2 * 0.1 mm, the case will
thus have to grow to a total width of at least 53.7 mm.
Since I'll have to stretch it to at least 54.0 mm to accommodate
the mechanical buttons anyway, this fits quite nicely.
- Werner
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Qi Hardware Discussion List
Mail to list (members only): ***@lists.en.qi-hardware.com
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