Based on 4x4x4 and 8x8x8 LED cube by Christian Moen http://www.instructables.com/id/LED-Cube-4x4x4/
License GPLv3 or newer
Versions:
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4x4x4_ledcube - Set up for Atmega32 using 8mhz internal clock. Hold down button while resetting to enter random mode and set the random seed.
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Micro_cube - The same code as above except for an Arduino Pro Mini 168 with outputs remapped (can be used with 328) and no button.
Notes:
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Optimized code to compile under 14k for Atmega168 with Arduino bootloader.
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Made code more portable for different size cubes.
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Removed serial initialization since it was never complete for the 4x4x4 cube and only took up space.
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New effects include, Fireworks with multiple explosion types, Rain with ripples on bottom layer, Spinning-plane-square, Spiralling-plane-square