It appears to be using the NXT proximity sensor, so I imagine it's like this;
In case anybody thinks otherwise, this isn't my project, but a video I found on UTube last night (thanks to Wired for the x-ref) - which is why it's in this forum. I think it's awesome, and wish I hade made it.
Ball velocity of 2m/s is pretty scary. Let's hope they are metal balls and can be collected with a magnet.
I'm thinking of trying to replicate the drivetrain for Chaser at some point, but I'm focused on Ratbert just now.
Nice project! Excellent video. What are the sensors? Is it edge detection using offloaded video processing?
Why is this not a "robot"? This has an autonomous mode, I resent the fact that this is in your forum. :D
Really nice project.
For a moment I thought you'd made this one Mike.
What a pain in the neck picking up after it though :D
He needs a second robot to gather the spent ammunition and reload OGRE.