Check out the following link. It has a listing of PIC resources,
including a link to a variometer.
http://www.geocities.com/SiliconValley/Way/5807/

Motorola has a good selection of pressure sensors, with and without
signal conditioning. They're at http://www.mot.com
I've been playing with a Motorola sensor and it works quite well. I
just don't recall the part number of hand.

I've seen pressure sensors in the Digi-Key catalog
(http://www.digi-key.com). The manufacturer is Lucas, part numbers
are NPC-410 and NPC-1210. I don't have any experience with them.

Regards,
Adi



> Hi
>
> I've an idea for a few PIC based toys (all non-commercial!) that I've
> been thinking about for a while. They all depend on an pressure sensor
> of some kind, but which?. Suggestions and comments (from part numbers
> upwards!) would be more than welcome:-
>
> 1. Simple, small, fast, (helmet-mounted?) vario - no integrated GPS!
> 2. For free-fall parachuting - you just passed 3,000' (2,000', whatever)
> going too fast - BEEP! pull now!
> 3. I have a friend into model rockets - how high do they get?
>
> Thoughts on any of the above would be very welcome.
>
> Regards
>
> John Midgley
>