I was wondering if anyone thinks its possible to build a ldr grid. Using a number of ldr's in a vertical and horizontal format to make a grid. So if an object passed through the grid. The ldr's would be triggered to give a location within the grid. What I'm thinking of is a grid(screen) that you ca…

LDR grid

liuzengqiang February 3, 2011, 5:32am 4

IR is not good outside under the sun. Why not using a video camera to capture an image to show where the ball goes through? How fast it the ball?

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