How to Control the Arduino's GPIO Pins From a Web Page - Circuit Basics
Digital Input With a Pushbutton With Arduino in Tinkercad : 7 Steps (with Pictures) - Instructables
Arduino Uno Rev3 SMD
electronics - Can you use an input pin instead of ground in Arduino circuitry? - Arduino Stack Exchange
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Arduino - Control RGB LED with Potentiometer - The Robotics Back-End
How to Wire a Button to Arduino? Using Internal Pull-Up. - Circuit Journal
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Arduino Class: Input/Output : 5 Steps - Instructables
IoT: Connecting the Arduino to the Internet – Sweetcode.io
Button, why a connection to ground? - Noob questions - General Electronics - Arduino Forum
Using outputs pins as ground? - Project Guidance - Arduino Forum
button connection without connection to 5V pin - Arduino Stack Exchange
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L1: Turning on an LED - Physical Computing
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Connecting multiple Grounds to one Arduino pin - General Electronics - The Contextual Electronics Forums
Lab: Digital Input and Output with an Arduino – ITP Physical Computing
Getting Started With Arduino : 6 Steps (with Pictures) - Instructables
Can you use Arduino Digital I/O pins as GND and +5v? - Project Guidance - Arduino Forum
Why is the digital out acting as ground on arduino? - Electrical Engineering Stack Exchange
