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Tutorial on how seven-segment displays work and how to make the circuit that decodes a two-bit binary number to display it on a 7-segment display. The procedure to implement the circuit is also introduced if the input number is 4 bits, either BCD (0 to 9) or hexadecimal (0 to 15). Presentation available: https://doi.org/10.5281/zenodo.3746659 The following tutorial shows how to design and simulate this circuit in a digital logic design tool: • Digital simulator tutorial (p1): deco... Additionally, this book of solved problems in digital electronics is available: https://eciencia.urjc.es/handle/10115... The book explains how to make Karnaugh maps with four variables. More videos on digital electronics: • Fundamentals of digital electronics CC-BY licensehttps://creativecommons.org/licenses/...