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how to control 64 servos with arduino?

Hello everyone.

I am working on a project where I am planning to use 64 servos that track the motion of a mouse and they operate according to the x and y position. Until now I have made a sample with 8 servos in a row, and using Processing I am feeding with data my arduino uno. However, going to 64 servos looks scary to me. Do I have to use 2x arduino uno + 2x 32 servo shield or should I switch to arduino mega? Is there any other alternative?

Here is a 32 servo shield that I have found: http://www.ecrater.co.uk/p/15329910/arduino-sensor-shield-v50-expansion?gps=1

Thanks in advance!

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thank you guys for your very usefull responces! I bought this http://www.adafruit.com/products/815 shield and it works fine. Now I have to find a way to control it through Processing...!