[sdiy] Force Sensing Resistor

[Tom Bugs]

Urgh to Maplin (stink of sulphur!)

There's another place in the UK that sells 'em a load cheaper -- 
Middlesex Teaching Resources - www.mutr.co.uk (and they have a few other 
interesting materials too)

Just search for QTC:
http://www.mutr.co.uk/catalog/advanced_search_result.php?osCsid=b14691a125926fc1e4ef01286af044ca&keywords=QTC&osCsid=b14691a125926fc1e4ef01286af044ca&x=0&y=0

All best from Bugs


JH. wrote:
> I came late into this thread. Edward, have you built your own keboard with 
> polyphonic aftertouch ?!
> What keyboard action did you use to retrofit with QTC pills?
> Do you have any pictures of what you've built?
>
> I thought the Pills respond in en exponential rathe than linear way. Thought 
> I read this somewhere.
> I've ordered some of these from Maplin yesterday. Curious to try them 
> myself!
>
> JH.
>
>
> ----- Original Message ----- 
> From: "Edward King" <edwardcking2001 at yahoo.co.uk>
> To: <xyzzy at sysabend.org>
> Cc: "Synth DIY List" <synth-diy at dropmix.xs4all.nl>
> Sent: Saturday, September 15, 2007 5:42 AM
> Subject: Re: [sdiy] Force Sensing Resistor
>
>
> Hi Tom!
>
> Actually, although they make some products in the uk, they also have a
> manufacturing unit in the far east (or at least in that direction).
>
> I went a bit overboard with them when I came acrross them and have given
> proportional control to various objects that really shouldnt have
> it....however....
> Let me know if you want me to send you over a couple of samples as I've got
> to order some more in anyway.
>
> A nice quickie experiment (proof of concept) is find someone with a slightly
> earlier model car, pop off the electric window switch, shove a QTC pill in
> between the contacts and hey presto! You have (or should have depending on
> the car and switching arrangement) proportional electric window control :o)
>
> for more relevant uses, the forum on peratechs website will be helpful in
> getting the best out of the materials and if you want more hints and
> practical advice, just gimme a shout. Remember, the output is _very_nearly_
> linear but not quite so for finer control, you need to tweak things a bit.
>
> EK
>
>
> ----- Original Message ----- 
> From: "Tom Arnold" <xyzzy at sysabend.org>
> To: "Edward King" <edwardcking2001 at yahoo.co.uk>
> Sent: Friday, September 14, 2007 5:32 AM
> Subject: Re: [sdiy] Force Sensing Resistor
>
>
>   
>> On Fri, Sep 14, 2007 at 05:26:45AM +0300, Edward King wrote:
>>     
>>> QTC cable is what Im using for keyboards that only need aftertouch for
>>> the
>>> whole board. For individual aftertouch (I can never remember whether its
>>> called poly or mono) QTC pills.
>>>       
>> Oh.  Nifty, How did I miss this product??   Looks like its made in the UK?
>>
>>     
>>> Both QTC cable and QTC pills are very cheap and pretty linear.
>>>       
>> For Poly I'm back to playing with Hall Effect sensors since they have
>> dropped in price.  I hope to have something to report soon...
>>
>> -- 
>> --------------------------------------------------------------------
>> - Tom Arnold           -  "...is it a virus, a drug, or a religion?"
>> - Sysabend Caretaker   -    Juanita Shrugs. "What's the difference?"
>> ------------------------       -- Neal Stephenson,  Snow Crash
>>
>>
>>     
>
>
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