32x32 RGB LED Matrix Panel - 4mm Pitch : ID 607 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits
RGB LED Matrix Panel - 32x32 (3.3-5V, 2A)
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64x32 RGB LED Matrix With Arduino Mega : 6 Steps - Instructables
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64x32 RGB LED Matrix - 6mm pitch : ID 2276 : $64.95 : Adafruit Industries, Unique & fun DIY electronics and kits
32x16 RGB LED matrix display with Arduino UNO microcontroller | DFrobot - YouTube