Introducing Adafruit Trellis Trellis is an open source backlight keypad driver system. It is easy to use, works with any 3mm LEDs and eight tiles can be tiled together on a shared I2C bus. by lady ada published December 06, 2013, last edited January 22, 2025 posted in Adafruit Products Trellis/ Classic Trellis 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 Adding LEDs Connecting Tiling Python & CircuitPython Python Docs Downloads Single page Feedback? Corrections? Text View Featured Products view all Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs Out of Stock Silicone Elastomer 4x4 Button Keypad - for 3mm LEDs $4.95 Add to Cart Adafruit METRO 328 Fully Assembled - Arduino IDE compatible Out of Stock Diffused Blue 3mm LED (25 pack) $5.95 Add to Cart Diffused White 3mm LED (25 pack) $4.95 Add to Cart Diffused Red 3mm LED (25 pack) $4.95 Add to Cart Diffused Green 3mm LED (25 pack) $4.95 Add to Cart 48 Beginner Project guide 🔥 1 Python Docs Page last edited October 08, 2019 Text editor powered by tinymce. Python & CircuitPython Downloads