Accelerometer in next hardware revision?

openmoko at openmoko at
Tue Jun 5 23:51:04 CEST 2007

> Do you have any details about the accelerometer in the upcoming GTA02 that
> you
> can disclose at this time? Which one will it be?

Basically - all silicon micromachined accelerometers are pretty similar at
this time. is a not
unlikely candidate for the neo.

It's about $5 - in 1000 off quantities.
This is the device used in the Wii controller.
It can measure to 3G in any direction, and will survive without harm
shocks that will shred the phone.

The offset due to temperature is about +- .1 milligee per C.
The random noise is around 300uG / sqrt(Hz).
This noise figure is utterly useless in many cases - it implies for
example that (neglecting orientation) you can keep an inertial position of
around 1m in 24 hours.

In practice, over ranges likely to be useful, an acceleration of some
3cm/s or so should be easily achievable.

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