Gail Pink
That is so unbelievably cool. You really could watch it forever.
Ant1
If you can stick a counter on the machine, this would be the perfect battery tester. We could test all sorts of them to see how long they last, including rechargables…. please do it
PaulVI
And it’s not all about the marbles. Nice design, mechanics and woodwork!
Ajan
It was fun to watch them in Museums of Physics and stuff. There is one Visveswaraiah Museum in Bangalore,India. And the marble machine over there follows nearly all the laws of physics (including trajectory and elasticity). Only this is that it has big black balls (size of a normal baseball ball) instead of small marbles.
I’ll see if I can make one with proper instructions.. 
Ajan
No, wait. I changed my mind. that thing requires a lot of calculations..
Frau
After seeing that – Am I the only one that thought of this classic > http://www.youtube.com/watch?v=67khDZ0P7Xo
Gregor
any suggestions as to how to build your own? What did you use for motors – servos? What about control…is it all in the timing, or do is there a microcontroller that we’re not seeing? I’d love to build one of these….
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