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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Sun, 29 Jun 2003 12:29:56 GMT
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Viewed:
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2779 times
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> > 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?
Philo
www.philohome.com
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Message has 1 Reply:
 | | Re: Touch Switch 2974
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| "Philippe Hurbain" <philohome@free.fr> wrote in message news:HH8tDw.B8I@lugnet.com... (...) metallic (...) with (...) 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 (...) (21 years ago, 1-Jul-03, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Touch Switch 2974
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| (...) metallic (...) with (...) 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. (...) (21 years ago, 28-Jun-03, to lugnet.robotics.rcx)
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