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Matrix problem - LEDs and Multiplexing - Arduino Forum
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Arduino 16x8 display with dual red 8x8 LED matrix - YouTube
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2041 16x8 LED Matrix
16x8 1.2 LED Matrix + Backpack - Ultra Bright Round Red LEDs : ID 2037 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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