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So why does it have to use audio? And why can't it use servos to move the lasers?

• ehsanu1 13y ago
  Both were due to cost, especially the servos. But I think a microcontroller capable of usb would not be particularly expensive, though more expensive than not having it.
  • peeters 13y ago
    It also removes a lot of code complexity, or at least moves it to the computer where it's easier to write and update.