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  • LED Cube 7x7x7 almost 3 years ago

    Ok, you can calculate the necessary resistance in this way:
    (average voltage)/current
    In this case for a current around 10mA you need: (5V-3.25)V/10mA=175 ohm, You should use a resistor around this value.
    Obviously 5V is the supply voltage.

  • LED Cube 7x7x7 almost 3 years ago

    Hi you can use 220 ohm resistors so you will have a current around 13mA, I think it is enough. If you want you can use also 330 ohm resistors so you will have a current around 8mA.
    You can choose one of it considering the best quantity of light for you.

  • LED Cube 7x7x7 about 3 years ago

    Hi, you can solve this problem with the technique of multiplexer, you can divide the image in some frames each frame is easier than the entire image and the combination of all frames create the image. In this way you can use less LEDs at the same time and the IC can provide the necessary current.

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