Subject:
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touch sensors aren't just switches (was Re: ideas for a RIS 2.0
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 25 Aug 1999 00:23:14 GMT
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Viewed:
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755 times
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In lugnet.robotics, John A. Tamplin writes:
> Put a touch sensor port into raw mode and watch the values you get as you
> gradually depress the sensor. There is not a sharp cutoff like there is
> with a typical contact switch.
>
> I tried building a touch sensor multiplexor, but I was unable to reliably
> get even 3 to work because the minimum resistance is quite large and
> because the transition from infinite to that minimum resistance is quite
> gradual. By switching to micro-contact switches, I was able to reliably
> get 4 switches to work, including operating with a wide range of battery
> freshness.
Wow. That's pretty darn disappointing. I even bought extra touch sensors to use
in multiplexed designs (but I haven't made the multiplexer yet). I guess I'll
have to build some of my own touch sensors...
I wonder why LEGO designed the touch sensor that way and then made the
programming environment ignore it?
- Robert Munafo http://www.mrob.com/
LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13
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Message has 1 Reply:
Message is in Reply To:
 | | Re: ideas for a RIS 2.0
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| (...) gradually depress the sensor. There is not a sharp cutoff like there is with a typical contact switch. I tried building a touch sensor multiplexor, but I was unable to reliably get even 3 to work because the minimum resistance is quite large (...) (25 years ago, 24-Aug-99, to lugnet.robotics)
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