LED cube - basics of timing /frequencies

Discussion in 'The Projects Forum' started by atferrari, Jul 8, 2013.

  1. atferrari

    Thread Starter AAC Fanatic!

    Jan 6, 2004
    I've spent many hours in the last days reading about POV and LED cubes.

    Given an 8 x 8 x 8 cube and a refreshing frequency of 150, from all my reading I concluded the following:

    T (to light them all) = 1/150 = 6667 usec

    Time devoted to each LED in the sequence (whether on or off) = 6667 usec / 512 = 13 usec / LED

    If I have to introduce some variation in the perceived luminosity of each one I should apply to every LED a PWM signal of suitable frequency during the asigned time slot of 13 usec.

    I am not sure if I will build one cube or not (most probably no) but I am interested in the concept.

    Please, I am not looking specifically for links but basically anyone telling me if what I say above is correct or not. Comments really appreciated.

    Also, isn't a 8 layers cube as proposed, equal to a 2D frame of 64 x 8 LEDs on this regard?
    Last edited: Jul 8, 2013