button connection without connection to 5V pin - Arduino Stack Exchange
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How to Use Digital INPUT and INPUT_PULLUP on Arduino - YouTube
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L1: Using buttons - Physical Computing
L1: Using buttons - Physical Computing
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Arduino Internal Pull-Up Resistor Tutorial - Bald Engineer
Pull-up and pull-down resistors on Arduino - ElectroSoftCloud
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DeepBlue Blog | Embedded Systems Tutorials, Articles And Much More
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Input Pullup Serial using Arduino -
