How to Set Up Keypads on the Arduino - Ultimate Guide to the Arduino #22

Learn how matrix keypads work and how to set up and program them on the Arduino. To demonstrate we will build a project that uses a matrix keypad and a password to activate an LED and a 5V relay. This is tutorial #22 in the Ultimate Guide to the Arduino, a complete video course on the Arduino microcontroller with 45 lessons that are designed to teach anyone how to master the Arduino at any skill level. Visit our YouTube channel page to watch the entire series! Get the 3-in-1 Arduino Smart Car and IOT Learning Kit from SunFounder here: https://www.sunfounder.com/products/sunfounder-3-in-1-iot-smart-car-learning-ultimate-starter-kit?_pos=1&_sid=b9504073c&_ss=r&ref=5RPAW01H Or get the kit from Amazon: US Amazon: https://amzn.to/3W1Mahh DE Amazon: https://amzn.to/3j0oETn JP Amazon: https://amzn.to/3UYrHZG UK Amazon: https://amzn.to/3uTJZAC CA Amazon: https://amzn.to/3W2vExN Get a 3-pack of the 4X4 membrane keypad from SunFounder here: https://www.sunfounder.com/products/membrane-switch-keypad?_pos=1&_sid=e6073c902&_ss=r&ref=5RPAW01H Visit the webpage for this video tutorial on Circuit Basics for wiring diagrams and example code: https://www.circuitbasics.com/how-to-set-up-a-keypad-on-an-arduino/ And be sure to check out the Circuit Basics blog and social media for more articles and tutorials on the Raspberry Pi, Arduino and other DIY electronic projects! https://www.circuitbasics.com Facebook: https://www.facebook.com/circuitbasic Twitter: https://www.twitter.com/circuitbasics Instagram: https://www.instagram.com/circuitbasics