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 23:42:37 GMT
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Viewed:
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995 times
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"Chris Phillips" <drvegetable@attbi.com> wrote in message
news:HqBKq4.A5I@lugnet.com...
> 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
Then you have a difrent set of switches than me. Mine only gives out a
shorten curcuit when pressed and a open connection when not pressed. There
are no resistance between the two stages. This are switches from the 1.5
set, maybe the new one from the 2.0 set is diffrent? Have to take apart my
robot and test them too....
The way I'm testing them is by connecting a multimeter to the switch
connector and slowly press the button in. It just goes from nothing to 0 ohm
in no seconds.
Reagards
Øyvind Steinnes
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Message has 1 Reply:
 | | Re: touch sensitive sensor
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| (...) Are you sure your multimeter is up to the task? I have measured numerous touch sensors (from 1.5, 2.0 and cybermaster), all of them have a high value when not pressed (open for RIS 1.5 and 2.0, 10 to 15KOhm for Cybermaster that have a (...) (21 years ago, 23-Dec-03, to lugnet.robotics)
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Message is in Reply To:
| | Re: touch sensitive sensor
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| (...) 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 (...) (21 years ago, 22-Dec-03, to lugnet.robotics)
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