Subject:
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Help needed with opto-interrupter rotation sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 23 Aug 1999 01:33:59 GMT
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Viewed:
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621 times
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Hello,
I am new to the area of homebrew Lego sensors and electronics. However,
I wanted to build my own opto-interrupter based rotation sensor using an
emitter dectector pair. I have been trying to setup my circuit like the one
proposed by Malcolm Powell at
http://www.umbra.demon.co.uk/sensor1.html.
I have been used a slotted Infrared Emitter and Detector Pair (Radio Shack #
276-142). When I hook up the circuit I an getting an open circuit where the
emitter-detector pair is connected. The diagrams on the back of the package
for this device do not indicate which side is the emitter and which is the
detector. Also, I cannot tell which pins are the anode and which are the
cathode. They are all of the same length, unlike what the diagram on the
package says (e.g. the cathode should be shorter than the anode). I
basically do not understand how to hook this thing up and how I can test to
make sure it is working properly. PLEASE HELP! The emitter detector pair
is put inside a symmetrical case with minimal markings printed on the
outside of it. Sorry if these are stupid questions, but I am not that
electrically inclined so bear with me.
Thanks,
Ankesh
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Message has 1 Reply:
 | | Re: Help needed with opto-interrupter rotation sensor
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| fototaker <fototaker@hevanet.com> wrote in message news:FGw9EE.Dp7@lugnet.com... (...) I've never seen the Radio Shack part but I found this on the Radio Shack page. Infrared Emitter and Detector Pair (276>-<0142) Hints and Tips Faxback Doc. # (...) (25 years ago, 23-Aug-99, to lugnet.robotics)
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