Subject:
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Re: Touch Switch 2974
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Tue, 1 Jul 2003 00:26:50 GMT
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Viewed:
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2952 times
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"Philippe Hurbain" <philohome@free.fr> wrote in message
news:HH8tDw.B8I@lugnet.com...
> > > indeed, the construction of this beast may be very different (e.g. • metallic
> > > contact, 0 resistance... and a lot of bounce almost completely avoided • with
> > > conductive rubber)
> >
> > I was fortunate enough to find one of these on BrickLink and
> > it just came in today. It turns out the resistance is 2.2K and I
> > suspect the contacts are metal since the resistance doesn't seem
> > to vary with pressure. It's an open circuit when the actuator
> > is not pressed.
>
> Did you try to test contact bounce ? since there is a rather high value
> resistor, perhaps Lego added a small capacitor too to debounce it?
No capacitor as far as I can tell. I looked at it on the scope and the
transitions were no different than if I just used a 2.2K resistor and
a bare wire as a switch. In both cases I noticed some nasty
transitions.
Mark
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Message is in Reply To:
 | | Re: Touch Switch 2974
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| (...) Did you try to test contact bounce ? since there is a rather high value resistor, perhaps Lego added a small capacitor too to debounce it? Philo www.philohome.com (21 years ago, 29-Jun-03, to lugnet.robotics.rcx)
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