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Medium 16x32 RGB LED matrix panel - 6mm Pitch : ID 420 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
JOY-iT 64x64 RGB-LED Matrix Module | Elektor
Amazon.com: SunFounder Full Color RGB LED Matrix Driver Shield + RGB Matrix Screen Compatible with Arduino : Electronics
WS2815 12V 16x16cm LED Matrix RGB Flexible LED Screen Panels
Overview | 32x16 and 32x32 RGB LED Matrix | Adafruit Learning System
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