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Topic: 361 sensors (Read 1 time) previous topic - next topic

Ill Mill

#5
Mar 06, 2009, 10:21 pm Last Edit: Mar 06, 2009, 10:25 pm by cverink Reason: 1
I would think you could use phototransistors for your sensors, they work by emitting infrared light, and then reading how much of the light is reflected back. So it will be able to detect if an object is there or not. It will also read a different value based on the color of the stone because different colors reflect the IR light better. This is an example of what I mean.
http://www.sparkfun.com/commerce/product_info.php?products_id=246

Guess i was a little behind on that post... However I do think you could tell the difference between the colors depending on the finish of the stone ie Rough or Glossy.

macegr

If you're already using a computer, why not build a transparent Go board out of acrylic, and put a webcam underneath it. Then use image analysis to determine the stone placement. Look at some of the existing multitouch projects for inspiration.
Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store

Ill Mill

What is the purpose of porting the data back to the computer? What will the computer do with the data?

vxir

How about a web cam with 361 fiber optic cables piping a bit of light?  That would be a LOT cheaper than 361 individual sensors especially if you could buy the plastic fiber opticsand acrylic board not necessary.  I guess you would need a tiny drill hole in each square with the fiber inserted in it though.  Note, I've never tried viewing fiber optic cable thru a webcam... just an idea.

macegr

Suggesting fiber optic definitely generates some new ideas for solving this problem...the webcam idea is pretty good, maybe it would even be possible to mechanically scan an array of fibers with phototransistors.
Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store

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