Gammon Forum : Electronics : Microprocessors : Switches tutorial
Arduino Button or Switch Interface Circuit without Pull Up Resistor
How to Wire a Button to Arduino? Using Internal Pull-Up. - Circuit Journal
InputPullupSerial | Arduino Documentation | Arduino Documentation
What is Pull Up and Pull Down Resistor and Where to Use them?
Pull-up Resistors - SparkFun Learn
Pull-up Resistor vs Pull-down - Differences, Arduino Guide - Latest Open Tech From Seeed
What does pulldown resistor from Arduino's output pin to ground do? Is it necessary? - Electrical Engineering Stack Exchange
L1: Using buttons - Physical Computing
Understanding the Pull-up/Pull-down Resistors With Arduino : 6 Steps - Instructables
Working Without a Pull-up/ Pull-down Resistor With Arduino - Instructables
How to wire a switch to a microcontroller with pullup resistors
Floating Pins, Pull-Up Resistors and Arduino - YouTube
USING A BUTTON TO CONTROL THE LED ON ARDUINO UNO BOARD – Welcome to electromania!
Can a resistor be connected with ground (I just saw in Arduino circuit), and why? - Quora
Digital Input Pull-Up Resistor | Arduino Documentation | Arduino Documentation
L1: Using buttons - Physical Computing
Pull-up Resistors - SparkFun Learn
InputPullupSerial | Arduino Documentation | Arduino Documentation
3 Different way of connecting a push button to Arduino » DIY Usthad
arduino uno - Do I need a pull-up/down resistor for button LED circuit? - Arduino Stack Exchange
