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Adafruit 1.2 4-Digit 7-Segment Display w/I2C Backpack - Yellow : ID 1269 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Learn How a 4-Digit 7-Segment LED Display Works and how to control it using an Arduino - Software Particles
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Amazon.com: Adafruit 0.56" 4-Digit 7-Segment Display w/I2C Backpack - White [ADA1002] : Industrial & Scientific
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