Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout Control up to 80 keys over I2C! by Liz Clark published September 21, 2022, last edited January 22, 2025 posted in Adafruit Products Arduino Compatibles CircuitPython Breakout Boards STEMMA Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Link Note Download Overview Pinouts Python & CircuitPython Python Docs Arduino Arduino Docs Downloads Single page Feedback? Corrections? Text View Guide Products view all Your browser does not support the video tag. Primary Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout $5.95 Add to Cart View product details 12 Beginner Product guide Arduino Docs Page last edited September 15, 2022 Text editor powered by tinymce. Arduino Downloads