AVR-Chat

Interesting.  Thanks for the link.

What I'm looking for is something to be lowered down a 2 1/2 inch diameter 
PVC pipe into a coal mine on a borehole camera. The sensor should probably 
be an inch in diameter or less.

We've encountered situations where we don't know which direction the 
camera is pointing.  I thought of mounting a little compass below the 
camera but things tend to get very muddy on the way down and it might get 
obscured.

I might be using an AVR to control camera position from the surface. In 
that case, I can add a routine to communicate the sensor data. It  
promises to be an interesting project!

Zack


On Sat, 21 May 2005, Bruce Parham wrote:

> Zack Widup wrote:
> 
> > On Sat, 21 May 2005, Robert Adsett wrote:
> >
> > This is sort of distantly related to the topic.  Have any of you ever done
> > anything with a flux gate compass?
> >
> > Zack
> 
> I worked for a small company in Texas about 20 years ago that did and from scratch.
> Quite an interesting process. The flux gate sensor has some very good competition
> these days. As I sit typing this, my $40 US Timex tells me that I'm facing 28 Degrees.
> It uses a pair of small 2x2x6 mm Magneto-Inductive sensors made by PNI.
> Check http://www.pnicorp.com for more.
> 
> Bruce
>