How to wire a button to Arduino?
Wiring a button to an Arduino is a fundamental skill. Here’s a complete guide covering the wiring, the code, and the important concept of debouncing. 1. The Basic Circuit: Pull-Down Resistor The most common and reliable way to wire a button is with a pull-down resistor . This configuration ensures the Arduino pin reads a definite LOW signal when the button is not pressed, avoiding a "floating" pin. Components Needed: Arduino board (Uno, Nano, etc.) Pushbutton 10k Ohm resistor (Brown-Black-Orange) Breadboard and jumper wires Wiring Diagram: text Arduino 5V ----> Pushbutton Pin 1 Pushbutton Pin 2 ----> 10k Resistor ----> Arduino GND | ˅ Arduino Digital Pin (e.g., 2) How it works: When the button is NOT pressed , the input pin is connected to GND through the resistor. This pulls it down to LOW (0V). When the button IS pressed , a path is created from 5V to the inp...