[sdiy] Re: DIY-DSP card (was: "Wakeman (sigh)" )

[Ian Fritz]

At 12:18 PM 7/8/2003, Tim Ressel wrote:

>Yeah, this gizmo was described to me once. I wonder if
>it could be made with magnets and hall-effect sensors?
>It looks like a cool i/f.

Probably not.  The field around a magnet falls off very rapidly (r^-4) so 
the range of the sensor would be very small.  I believe that is why they 
are using rf.

I use magnets and linear Hall sensors on my SoS controller, so if you want 
to play around with this idea you can find some circuitry here:

http://home.earthlink.net/~ijfritz/sos_circ.htm

   Ian