Playing piano with optical sensors

October 7, 2010 By 16 Comments

[Sebastian] is trying to improve the responsiveness of an electric keyboard. He was unsatisfied with the lack of adequate sensitivity to keystroke. The first step in his process was to measure how fast the quickest keystroke actually is. By setting up an LED and phototransistor and taking some measurements he found that sampling at 1 kHz would be more than … Read the rest

Filed Under: musical hacks Tagged With: , , , , , , , ,

AVR controlled Rubik’s cube solver

September 11, 2009 By 16 Comments

[Andrius] just sent in his robot Rubik’s cube solver. It isn’t as fast as the solver we saw last year but it also doesn’t require as many parts either.  This project utilizes two claws, each actuated by just two servo motors. The thinking is done by a PC which calculates the necessary moves to solve the cube. Each instruction … Read the rest

Filed Under: classic hacks, robots hacks Tagged With: , , ,
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