[sdiy] Hall Effect transistor question

[Ian Fritz]

At 02:47 AM 5/7/06, Michael Bacich wrote:

>  I was finally able to get a perfect substitute for the original part 
> from Allegro Semiconductor.  In fact, they sent me a handful of free 
> samples, so I've got some extra ones now to play with.  I'm not sure what 
> I'll do with them yet -- a potless CV or wah pedal comes to 
> mind.  Anybody have any other ideas?

Good news!  Those sensor companies have been changing hands and changing 
their products so often it's usually hard to find exact replacements.  I 
also got a bunch of free samples from Allegro with no hassle about being a 
company, etc.  They're good guys.

The Hall sensors are best for measuring small displacements, because the 
magnetic field varies like the 4th power of distance.  I have some examples 
on my SoS pages.  Something like an aftertouch sensor would be another idea.

   Ian
http://home.earthlink.net/~ijfritz/sos_over.htm