Pull-up / Pull-down resistor
Hardware fundamentals: how pull-down and pull-up resistors work
Using switches with an Arduino – Input Pull-Up / Pull-Down
Pull-up Resistor vs Pull-down - Differences, Arduino Guide - Latest Open Tech From Seeed
The Simplest Way to Wire a Button to Arduino (with Internal Pull-Up) | Arduino Button Tutorial - YouTube
In a circuit with a switch and a pull-down resistor, why does the high impedance of the input not discourage current from flowing into pin? - Arduino Stack Exchange
Digital Input Pull-Up Resistor | Arduino Documentation
L1: Using buttons - Physical Computing
Can I get away w/ just one pull-down resistor? - General Electronics - Arduino Forum
How to wire a switch to a microcontroller with pullup resistors
Pull-up Resistors - SparkFun Learn
L1: Using buttons - Physical Computing
Arduino Uno Example Sketch: Digital Input Pullup - Arduino - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
InputPullupSerial | Arduino
Interference on my digital input - suggested fixes? - General Electronics - Arduino Forum
Arduino Digital Input: How to Use the Pull-Up Resistor! - YouTube
InputPullupSerial | Arduino Documentation
Input Pull-up Serial
Multiplexer, push buttons and input pull up resistors? - LEDs and Multiplexing - Arduino Forum
Pull-up or Pull-down? - General Electronics - Arduino Forum
3 Different way of connecting a push button to Arduino » DIY Usthad
Using switches with an Arduino – Input Pull-Up / Pull-Down
button connection without connection to 5V pin - Arduino Stack Exchange
L1: Using buttons - Physical Computing
Arduino misconceptions 1: need to use external pull-up resistors
Using Pushbuttons with Arduino. Pullup vs Pulldown resistors - Hackster.io
Pushbutton and Pull-Up Resistor - Project Guidance - Arduino Forum
Switches to control LEDs and can be read by Arduino - General Electronics - Arduino Forum
