Subject:
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Re: touch sensitive sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 22 Dec 2003 23:18:04 GMT
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Viewed:
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2568 times
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In lugnet.robotics, Øyvind Steinnes wrote:
>
> "Jona" <jona@24tooth.com> wrote in message news:HqB44J.204J@lugnet.com...
> > In lugnet.robotics, Øyvind Steinnes wrote:
> > <SNIP>
> > > There are many aplication you can use this type of sensor for. Like a robot
> > > that should grip something, and you dont want it to grip to hard. Use those
> > > tuchsensitive sensors on the "fingertips" on the robotic arm and it can
> > > "feel" when the fingers are tuching something and know how hard its grip is.
> > > Another aplication is a piano. Tuchsensitve sensor under each keys, and the
> > > piano knows how hard (fast) you have tuched the keys and kan make the volume
> > > of the tones acording to that.
> > >
> > > I've looked around on websites but cant find any sensor like this.
> > > Is there one already out there someplace? Or maybe someone is up to the task
> > > to make some? Do this sounds intresting at all?
> > >
> > >
> > > Regards
> > > Øyvind Steinnes
> > > http://www.brickshelf.com/cgi-bin/gallery.cgi?m=Phoenix
> >
> > Correct me if I am wrong, but aren't the buttons on the PlayStation 2 controler
> > all analog? They seem to do exactly what you are talking about, but maybe there
> > is some better processing going "on under the hood"? I wonder if you can pick up
> > an old controller off of e-bay and get at its guts?
> >
> > Jona
> > LEGO Robotics Group of Ann Arbor - http://www.24tooth.com
>
> Good idea!
> The button on the PlayStation 2 controller is analog, but I do not know how
> thay have made it that way. It could be a variable resistor that are under
> those button. Another way is to determine how fast you are pushing the
> button by taking the time from one switch activates to another switch.
>
> What I was looking for was a microsize analog button. In the size of a 2x3
> brick (or smaller if it can be done). Either prefinished inside a brick or I
> maybe have to make one myself.
The touch sensors that come in the RIS set already work as you describe, and are
even about the size of a 2x3 brick. The touch sensor has a variable resistance
that changes as more force is applied to the button. You just have to read the
raw port value instead of configuring the port to have a boolean 1/0 touch
sensor. Then you can read a value that varies as you apply more force to the
touch sensor.
Hope this helps!
- Chris
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Message has 1 Reply:
 | | Re: touch sensitive sensor
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| "Chris Phillips" <drvegetable@attbi.com> wrote in message news:HqBKq4.A5I@lugnet.com... (...) news:HqB44J.204J@lugnet.com... (...) robot (...) those (...) can (...) grip is. (...) and the (...) volume (...) the task (...) controler (...) maybe (...) (23 years ago, 22-Dec-03, to lugnet.robotics)
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Message is in Reply To:
| | Re: tuch sensitive sensor
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| "Jona" <jona@24tooth.com> wrote in message news:HqB44J.204J@lugnet.com... (...) robot (...) those (...) is. (...) the (...) volume (...) task (...) controler (...) there (...) pick up (...) The button on the PlayStation 2 controller is analog, but (...) (23 years ago, 22-Dec-03, to lugnet.robotics)
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