Strange Hall effect CV pedals

[Dave Halliday]

>     From: Harry Bissell <harrybissell at netscape.net>
>     To: pfperry at melbpc.org.au
>     Date:  6 Apr 99 21:45:57 EDT
>     Subject: Re: Strange Hall effect CV pedals 
>      
>     Harry Bissell writes: Don't go weird on me guys... Texas used to make 
>     a linear hall output device in a TO-92, but do they still?? This would 
>     be even harder electrically than an opto pedal. While you drift into 
>     left field... going...going... how about the LVDT (linear variable 
>     displacment transformer) You need an oscillator to drive it, 
>     syncronous rectifier to demodulate it, etc... but it is "non contact". 
>     An easier method might be an RF oscillator detuned by putting an iron 
>     slug into a fixed coil, and changing the inductance, then decode that. 
>     Also non contact... (but not non-silly). I'd still go with the Ernie 
>     Ball old time dial cord around a pot. If you worry about life use a 
>     really good optical encoder thay're good for millions of cycles...  




Or hey - why not get a couple of EKG electrodes, stick them on your 
leg, get the myoelectric potential, scale and range it to a 
zero-to-five volt spread and you wouldn't need any pedals at all...

Think of it - air pedals!  <g>



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