How to Use Digital INPUT and INPUT_PULLUP on Arduino - YouTube
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arduino uno - Do I need a pull-up/down resistor for button LED circuit? - Arduino Stack Exchange
Let's Learn: Arduino Digital Button with Pullup and Pulldown resistors
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Pushbutton and Pull-Up Resistor - Project Guidance - Arduino Forum
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How to Wire a Button to Arduino? Using Internal Pull-Up. - Circuit Journal
Pull-up Resistors - SparkFun Learn
Push Button with Arduino | Pull up & Pull down resistor | Led Control using Button - YouTube
Digital Input Pull-Up Resistor | Arduino Documentation
Arduino Pull-up Pull-down Resistor | Arduino FAQs
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Using Pushbuttons with Arduino. Pullup vs Pulldown resistors - Hackster.io
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L1: Using buttons - Physical Computing
InputPullupSerial | Arduino Documentation
Using Push Button Switch with Arduino Uno
