Melexis 90217 RPM sensor NEED HELP PLEASE!!!

jivy103

I am using a parallax Melexis 90217 RPM sensor on a windmill. the rpm data is transported to the basic stamp and then the motor controller will spin the motor the same speed as the windmill is turning. Im just not sure how to talk to the Melexis 90217 RPM sensor or let it talk back to me. I found the data sheet on parallax website on how to wire it up. I just need some help on the code used to use the sensor. Anyone used this sensor before or know what kind of code to use!!??!?!?!

any help would be greatly appreciated!!

Justin Iverson

UMD

Sculpture and Ceramics Major

Chris Savage

Justin,

The Melexis 90217 is a hall effect sensor. There is no talking to it, per se. All it will do is pulse its output in relation to a magnetic field near it. If you are trying to get RPMs you would generally count pulses within a specified time interval, such as 1 second, using the COUNT command. You could then use that to calculate RPM. For more information please see the following link.

http://www.parallax.com/ProductInfo/Robotics/MachiningTips/BASICMachiningRPMDisplayforyourMill/tabid/420/Default.aspx

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Chris Savage

Parallax Engineering
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PJAllen

I think that the Reply in the other Subject (same) you started was first rate.

http://forums.parallax.com/showthread.php?p=903628

Chris Savage

Had I caught that I would have deleted this one. Do not repost or cross post your message. Follow up in the original post when on the same subject. This will avoid issues like this one.

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Chris Savage

Parallax Engineering
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