I'd like to build a Variometer for an RC Sailplane.
Did any body around do that before ?
I'd like to constantly detect variation in altitude of ~ 5cm/s (~50Pa/s). for a range of -300m +700m from the takeoff point. From time to time, I'll need to have an absolute altitude above (below) the starting point.
The common sensors I have looked at won't do that.
I guess I'll need 18bits resolution, which I want to feed into an AVRmega.
Any Idea around ?
Martial