To convert from count to degrees I used AWC Electronics Floating Point Math
Coprocessor "Pak-IX". Sure its overkill for the simple math stuff
but its a no brainer. Plug in the variables and tell it what to do.

Roll (degrees) = ASIN ((DcycleNOW - DcycleCAL) / DcyclePER) * (180 / pi)

Where:
DcycleNOW = Duty Cycle taken now
DcycleCAL = Duty Cycle at Zero g taken during calibration
DcyclePER = Duty Cycle per g taken during calibration

http://www.al-williams.com/awce/pak9.htm

>From: Brandon Fosdick <bfoz@GLUE.UMD.EDU>
>
>Leslie Lowe wrote:
> > RC Airplane readings during "somewhat" straight level non accelerating
> > flight swayed between -4 and +4 degrees of pitch and roll during
>snapshots,
> > Peaks up to about +/-8. Snapshots were taken at 100ms intervals and
> > controlled by a separate rc channel from the transmitter. During the
>100ms
> > interval 8 samples were read and averaged per axis.
>
>How did you convert from counts to degrees?
>


_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body