Subject:
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Re: calculating sensor resistance (Ohm's Law)
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 7 Apr 2001 00:18:34 GMT
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Viewed:
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730 times
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Stef Mientki <s.mientki@ids.kun.nl> wrote:
: the inside of the RCX (in touch-sensor mode) is ok, and Ohm's law is also.
I actually used temperature sensor mode, since I wanted a passive mode
that wasn't just boolean. Would that have made a difference?
: So the problem lies probably in the sensor used. The cheap resistive
: pressure sensors are totally non-linear, more expensive sensors are
: full bridges and you've to use a more complex cirquit. What sensor
: are you using ?
Information on the sensor we used is at:
http://www.interlinkelec.com/technology/page01.htm if you click on FSR
guide. Our sensors are "Part #402".
The resistances we got range from a little under 1K (at 5V) to 10M
(<1V), which makes sense, I guess. Looks like the problem then is in
our conversion from resistance to force. Back to the manual...
-l
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Message is in Reply To:
 | | Re: calculating sensor resistance (Ohm's Law)
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| hi Lauren, you're quiet right, the inside of the RCX (in touch-sensor mode) is ok, and Ohm's law is also. So the problem lies probably in the sensor used. The cheap resistive pressure sensors are totally non-linear, more expensive sensors are full (...) (24 years ago, 6-Apr-01, to lugnet.robotics)
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