Subject:
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rotation sensor mystery solved?
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Tue, 25 Jan 2000 08:13:55 GMT
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Viewed:
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1454 times
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I was getting very erratic readings from a rotation sensor (if I put a pendulum
on it and moved it back and forth the 0 position would wander all over the
place). I started looking at the raw values from the sensor and comparing them
with what the kernel was doing. It turns out that the resistance of the ~100cm
long wire I was using to connect the sensor was enough to move all of the
sensor results off from what the `ad2state' array expected (making them mostly
state 0). If I remove the extension wire and test I get perfect tracking. Now
the project I'm working on requires the extension, so I'm going to have to find
a fix for this problem, but maybe this will be of some assistance to those who
have had trouble with legOS and rotation sensors...
--Ben
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Message has 1 Reply:
 | | Re: rotation sensor mystery solved?
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| (...) When I wrote my original post I was afraid that major surgery was going to be required to fix this. The values with an extension wire are actually shifted into formerly invalid slots which are contiguous with the existing state groups. So the (...) (25 years ago, 25-Jan-00, to lugnet.robotics.rcx.legos)
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