Pull-up / Pull-down resistor
L1: Using buttons - Physical Computing
Digital Input Pull-Up Resistor | Arduino Documentation
Interference on my digital input - suggested fixes? - General Electronics - Arduino Forum
Arduino Uno Example Sketch: Digital Input Pullup - Arduino - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
How to wire a switch to a microcontroller with pullup resistors
The Simplest Way to Wire a Button to Arduino (with Internal Pull-Up) | Arduino Button Tutorial - YouTube
Input Pull-up Serial
Multiplexer, push buttons and input pull up resistors? - LEDs and Multiplexing - Arduino Forum
Push Button with Arduino | Pull up & Pull down resistor | Led Control using Button - YouTube
Arduino misconceptions 1: need to use external pull-up resistors
L1: Using buttons - Physical Computing
Pushbutton and Pull-Up Resistor - Project Guidance - Arduino Forum
L1: Using buttons - Physical Computing
InputPullupSerial | Arduino
Pull Up or Pull Down? - Project Guidance - Arduino Forum
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
Using switches with an Arduino – Input Pull-Up / Pull-Down
Digital Input Pull-Up Resistor | Arduino Documentation
button connection without connection to 5V pin - Arduino Stack Exchange
button connection without connection to 5V pin - Arduino Stack Exchange
InputPullupSerial | Arduino Documentation
Switches to control LEDs and can be read by Arduino - General Electronics - Arduino Forum
Pull-up / Pull-down resistor
How to Wire a Button to Arduino? Using Internal Pull-Up. - Circuit Journal
