{"title":"Adafruit NeoTrellis RGB Driver PCB for 4x4 Keypad","handle":"adafruit-neotrellis-rgb-driver-pcb-for-4x4-keypad","url":"/products/adafruit-neotrellis-rgb-driver-pcb-for-4x4-keypad","description":"Upgrade your button-pad projects with full-colour NeoPixel backlighting. The NeoTrellis RGB Driver PCB is a 4×4 keypad controller with 16 NeoPixels and an onboard seesaw I2C chip that handles both button scanning and LED driving — all over plain I2C, no NeoPixel pin management required.\n\nThe boards are fully tileable — solder them edge-to-edge and close the I2C address jumpers to create grids of any arrangement, up to 32 boards on a single I2C bus. Both Arduino/C++ and CircuitPython/Python libraries are available. For a complete ready-to-go kit, see the 4×4 NeoTrellis Feather M4 Kit Pack.\n\nKey Features\n\n\n16 NeoPixels – Full 24-bit RGB LEDs pre-soldered, one under each button position\n\nSeesaw I2C Controller – Onboard chip manages both button matrix and NeoPixel driving over I2C\n\nFully Tileable – Solder boards edge-to-edge for larger grids (up to 32 boards / 512 buttons)\n\n5 Address Pins – Configure up to 32 unique I2C addresses for tiled setups\n\nJST-PH 4-Pin Connector – Quick connection for power and I2C data (Grove compatible)\n\n3 V and 5 V Compatible – Works with any microcontroller or single-board computer with I2C\n\n\nTiling\nTo create larger button grids, solder NeoTrellis boards edge-to-edge and close the I2C address jumpers on each board to assign unique addresses. A single I2C connection controls all tiled boards — no additional wiring needed beyond the edge solder joints.\n\nIdeal For\n\nMIDI controllers and music sequencers\nCustom control panels and interfaces\nInteractive art and light installations\nGame controllers with colourful button feedback\nScalable button grids for any project\n\n\nPackage Contents\n\n1× Adafruit NeoTrellis RGB Driver PCB with seesaw chip and 16 NeoPixels pre-soldered\n1× JST-PH 4-pin connector\n\n\n\nNote: Elastomer button pad not included — be sure to pick one up separately.\n\n\nResources\n\n\nNeoTrellis Learn Guide – Setup, tiling, and example code\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":7804,"title":"Default Title","sku":"AF-3954","price":24.38,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}