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Source for very small LED matrix display
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File:Tiny Dot-matrix LED Display by HP.jpg - Wikimedia Commons
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Using the 8x32 LED Matrix
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Buy Ultra Thin LED Matrix Panels – Wearable Tech Tutorials and How-Tos
A Tiny LED Matrix Is Better With Friends | Hackaday
Prototype DIY Tiny LED Matrix - YouTube
Tiny LED Matrix Display Clock : 8 Steps - Instructables
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Adafruit Mini 8x8 LED Matrix w/I2C Backpack - Red ID: 870 - : Adafruit Industries, Unique & fun DIY electronics and kits