Subject:
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Re: Question?
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 3 Feb 2002 17:06:09 GMT
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Original-From:
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PeterBalch <peterbalch@compuserveSPAMLESS.com>
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Viewed:
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397 times
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> When set to use "active" sensors, the
> inputs actually output power most of the time, switching briefly to
> input mode (no power output) to take a reading.
What I don't understand is how this works if the sensor is connected
backwards.
Sure, a bridge rectifier will get the power sorted out but how does the
sensor send back a voltage in the right range? If say "light" is 8V and
"dark" is 0V then when the sensor is connected backwards, "light" will be
0V and "dark" will be 8V.
Can anyone enlighten me. I've tried following links to the light sensor
schematics, etc. but they all seem to be broken.
Peter
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Message has 1 Reply:
 | | Re: Question?
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| (...) My guess (having never looked at the schematics, or taken one apart) is that when connected backwards, "dark" would be 0V and "light" would be -8V. Again, a simple bridge rectifier (this time in the RCX) would get it sorted out. It might be (...) (22 years ago, 4-Feb-02, to lugnet.robotics)
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