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L1: Using buttons - Physical Computing
Pull-up and pull-down resistors on Arduino - ElectroSoftCloud
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Digital Input Pull-Up Resistor | Arduino Documentation
Digital Input Pull-Up Resistor | Arduino Documentation
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L1: Using buttons - Physical Computing
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WHAT IS A PULL-UP / PULL-DOWN RESISTOR - Soldered Electronics
Pull-up and pull-down resistors on Arduino - ElectroSoftCloud
