A Harmonograph is a collection of pendulums whose swings are combined to produce a pattern. These were coupled in Victorian times by mechanical leavers. Here, for the first time ever, a computer system ( An Arduino ) monitors the instantaneous angle of each pendulum and electronically combines the angles to produce a computer trace. The patterns produced are unique each time you swing the pendulums because of the different starting conditions. Like many chaotic systems this system is very sensitive to initial conditions. Changes in pendulum length will also generate a whole new set of patterns.
Further information at:- thebox.myzen.co.uk/Raspberry/Pi_Projects.html
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