[sdiy] Force Sensing Resistor

[Edward King]

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
>
>