Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout 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 Primary Products Your browser does not support the video tag. Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout $5.95 Add to Cart Featured Products view all Membrane 3x4 Matrix Keypad + extras $3.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 50mm Long Out of Stock STEMMA QT / Qwiic JST SH 4-pin Cable with Premium Female Sockets $0.95 Add to Cart STEMMA QT / Qwiic JST SH 4-pin to Premium Male Headers Cable Out of Stock STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long $0.95 Add to Cart 11 Beginner Product guide Downloads Files TCA8418 Datasheet EagleCAD PCB files on GitHub Fritzing object in the Adafruit Fritzing Library 3D Models on GitHub Schematic and Fab Print 3D Model Page last edited March 08, 2024 Text editor powered by tinymce. Arduino