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drewskee
Joined: Sep 12, 2007 Posts: 15 Location: tenafly nj
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Posted: Wed Oct 10, 2007 6:40 am Post subject:
Force Sensitive Resistor Controler...will this work? |
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http://www.imagesco.com/sensors/force-sensors.html
I found this link and it "appears" that the 406 square and the little op-am circuit could be used to create a tiny touch sensitive controller that puts out between 0 and +5v.
Can anyone tell if this is as simple as it seems: plug in battery to PCB, plug in FSR, hook red wire to output jack = done?
Would be wonderful if true: 3 of these on a board would be tres' cool! |
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jksuperstar
Joined: Aug 20, 2004 Posts: 2503 Location: Denver
Audio files: 1
G2 patch files: 18
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Posted: Wed Oct 10, 2007 11:54 am Post subject:
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I think you'd still want to amplify the signal, depends on where it's headed though. If the input impedance was high enough, just the FSR is all you need.
-jk* |
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drewskee
Joined: Sep 12, 2007 Posts: 15 Location: tenafly nj
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Posted: Wed Oct 10, 2007 1:20 pm Post subject:
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It would be a "direct inject" cv to a Serge Modular CV Input... |
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jksuperstar
Joined: Aug 20, 2004 Posts: 2503 Location: Denver
Audio files: 1
G2 patch files: 18
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Posted: Wed Oct 10, 2007 4:09 pm Post subject:
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$6 buys you the right to try it out
I think it'd work fine. |
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drewskee
Joined: Sep 12, 2007 Posts: 15 Location: tenafly nj
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Posted: Wed Oct 10, 2007 8:16 pm Post subject:
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Oh, I was thinking I'd get it and the small circuit board at the bottom of the same page to make it work...no? Sorry if I was not clear but it was the pair that I thought would make a nice variable/virtual one axis touch plate. |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Thu Oct 11, 2007 3:15 pm Post subject:
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I wrote to these guys and they sent me a free sample of the flexi-force model. It's a little longer than I'd like and I haven't used it yet-- but he also sent me a bunch of applications circuits-- I'll have to find them, but I'd be happy to e-mail them to anyone. |
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bugbrand
Joined: Nov 27, 2005 Posts: 846 Location: Bristol, UK
Audio files: 1
G2 patch files: 1
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Posted: Thu Oct 11, 2007 5:04 pm Post subject:
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I'm sure any circuitry would be super simple (just amplifying and level shifting I'd guess) and easily breadboard-able.. thus, perhaps, negating the need for the circuitboard (which isn't too expensive, but at several times the price of the resistive elements they add quite a percentage to the project cost) _________________ http://www.bugbrand.co.uk
http://www.bugbrand.blogspot.com |
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dave_b
Joined: Apr 01, 2007 Posts: 42 Location: Kansas City
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Posted: Fri Oct 12, 2007 6:29 pm Post subject:
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That's the same technology used in the DrumKat midi controller. They work really well in that context. From the documentation I've read, they're normally set up as part of a voltage divider.
I'm not sure how finicky they are. I believe the Drum Kat reads the 'idle' resistance at bootup to calibrate itself. Don't quote me on that. |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Sun Oct 28, 2007 8:26 pm Post subject:
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After being reminded by this thread of the sample flexiforce I had, I wired it up and tested it attentuating a 15v source; I pretty much assembled the circuit on the web page using 15v instead of 5v. It worked great, I was extremely pleased. |
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