Tactex pressure pad

[Dave Halliday]

'Ya know, just thinking aloud here but...

You could put magnets on your fingertips and then use analog Hall Effect
sensors on an array.

Wiggle your fingers and get varying voltages out.

The sensors are made by Allegro Micro

Look at: http://www.allegromicro.com/selguide/hed1.htm
and scroll down to where it says: "Ratiometric Linear Hall-Effect Sensor"

A list of distributors can be found at: 
http://www.allegromicro.com/salesloc/sd2frame.htm

The sensors are a couple bucks each.  They also give out samples.




-----Original Message-----
From: WeAreAs1 at aol.com [mailto:WeAreAs1 at aol.com]
Sent: Friday, January 05, 2001 11:25 AM
To: synth-diy at node12b53.a2000.nl
Subject: Tactex pressure pad


Hello DIYfolk,

Here is an interesting goodie that was just reported on the MOTM list:

<A HREF="http://www.tactex.com/index.html">http://www.tactex.com/index.html
</A>

A sort of "polyphonic" pressure-sensitive X-Y pad, using fiber-optic 
technology to do its sensing.  By "polyphonic", I mean that a single pad can

simultaneously sense and interpret dynamic pressure from multiple fingers 
(unlike FSR sensors and other current touch sensors).  It looks like Bob
Moog 
is going to use this technology in his upcoming keyboard synth.  One 
immediately wonders what sort of DIY applications this thing might have...

Michael Bacich