Those who are not familier with my Aurora 9x18, please view its instructables here
Aurora 18x18 is built upon the same foundation. Special PWM technique enabling just one microcontroller to control 18x3(R/G/B) channels of brightness levels, without specialized LED controller ICs.
In addition to doubling the number of LEDs, Aurora 18x18 has a built-in infrared remote receiver. Now you can control this beauty from across the room, without leaving your chair.