Maybe I'm missing something here, but in normal roads, the slope of the=20
road surface (and vehicle) is not that great, with maybe 20 degrees=20
(36%)(tangent) being maximum. That would translate to an error of=20
6%(cosine) in the acceleration. I would think that error due to nose=20
tilt up/down is negligible. :) Didn't try to work out the actual=20
geometry, but think this is rough indicator, the cosine represents the=20
difference in actual distance traveled vs. the horizontal distance, and=20
ignoring the centripetal acceleration when going around curves.

On 3/27/13 7:19 AM, YES NOPE9 wrote:
> I want to build a device that flashes a rear brake light at an intensity =
 depending on the G-force due to braking.
> I want it to be super easy to install.  Such as throwing it in the back w=
indow and being done.  This would possibly mean a battery and solar charger=
..
>
> #1  I do not want to use data from OBD2 .........  This would increase in=
stallation issues.
> #2  How might I differentiate between G-force due to braking and that due=
 to the vehicle tilting nose up or nose down ?
>
> I was thinking maybe a gyroscope might do the trick.
>
> Gus

--=20
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