Hall Effect sensors...

[Matthew S. Padden]

>From:          CGS2510.SEP.STUDENT.UCA at CUB.UCA.EDU
>To:            mattp at mindless.com
>Date:          Thu, 18 Sep 1997 08:49:23 CST6CDT
>Subject:       Re: Hall Effect sensors...
>Priority       normal
>
> > Yep; somebody called Hall found out about the effect that magnetic 
>fields 
> > have on certain materials. (I can't remember the exact details, but 
> > basically I think it's magnetically sensitive semiconductors) As used 
>in 
> > some geetar wah-wah pedals, because then there's no expensive pot to 
>wear 
> > out and get noisy.
> > Very good idea, but I think they're quite expensive. Now, I wonder if I 
>can 
> > get my hydraulic/fluidic control panel working...;)
> 
>
> Hall noticed that a current passing through a conductor in a magnetic 
>field deflected the moving charges.  This created a small potential 
>difference on the sides of the conductor.  Originally they were copper of 
>something, but now I think they are typically semiconductors.  They seem 
>cheap to me, say 50 cents apeice! 
>

Hmm, I'm confusing these with something else then. The expensive joystick 
I'm referring to is in the RS catalogue, a contactless three-axis joystick 
that's around 40ukp. I wonder what it uses....
--
Matthew S. Padden
Computer Music Research Group
Room M5/14
Music Dept.
Huddersfield University
Queensgate
Huddersfield
England HD1 3DH
p: +44 1484 422288 x2402
f: +44 1484 472656
e: mattp at mindless.com
--------------------------------------------------------------------
"The masses are asses and need Tonto's glasses!" (Mark Mothersbaugh)
----------------------