gta02-core and external GPS antenna

Werner Almesberger werner at
Thu May 28 22:35:44 CEST 2009

Dr. H. Nikolaus Schaller wrote:
> There are some requests for a 3.5 mm Headset connector...

Oh yes, that one is a really popular idea. Joachim, Joerg, and I
discussed this a lot for the gta02-core-like design some months
ago. Joachim gave the perfect use case: hardly anybody uses a
wired headset these days. But a lot of people use their phone as
an MP3 player they can bring to work. For an MP3 player, all you
need is the audio output, no microphone. And the universal
standard for audio output is the 3.5 mm jack.

So far, so good. But then we realized that 3.5 mm receptacles
are too big for the space available, even if you go all the way
to the battery connector. (The battery connector can't move
without a case redesign.)

There's also the issue that a 3.5 mm receptacle is taller, so
you don't only have to make a bigger hole in the case, but you
also have to change its center. Height vs. the inner "floor"
of the case is probably an issue as well.

So it's trickier than it seems. If someone can find a 3.5 mm
receptacle that actually fits in the GTA02 mechanical design in
all three dimensions, that would be an interesting discovery,

- Werner

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