{"title":"Adafruit LED Glasses Driver - nRF52840 Sensor Board","handle":"adafruit-led-glasses-driver-nrf52840-sensor-board","url":"/products/adafruit-led-glasses-driver-nrf52840-sensor-board","description":"The Adafruit LED Glasses Driver is a slim, Bluetooth-enabled controller board built around the Nordic nRF52840 chipset. Originally designed to drive the Adafruit LED Glasses RGB LED matrix, it also works brilliantly as a compact standalone development board with built-in sensors and STEMMA QT connectivity.\n\nUnlike standard Feather boards, this driver trades GPIO breakout pins for a slim profile with onboard sensors — a LIS3DH triple-axis accelerometer for motion and orientation sensing, and a PDM digital microphone for audio sensing. If you need GPIO access, consider the ItsyBitsy nRF52840, Feather nRF52840 Express, or Feather nRF52840 Sense instead.\n\nKey Features\n\n\nnRF52840 Processor – ARM Cortex M4F at 64 MHz with hardware floating point, 1 MB flash, and 256 KB SRAM\n\nBluetooth Low Energy – 2.4 GHz radio with FCC/IC/TELEC certified module, up to +8 dBm output power\n\nNative USB – No separate USB serial chip needed; supports CDC serial, HID (keyboard/mouse), mass storage, MIDI, and more via TinyUSB\n\nBuilt-in Sensors – LIS3DH triple-axis accelerometer and PDM digital microphone\n\n2 MB External QSPI Flash – For CircuitPython file storage\n\nSTEMMA QT Connector – Plug-and-play I2C for adding sensors and peripherals\n\nBattery Support – JST PH 2-pin battery port with optional LiPo charging (enable via solder jumper)\n\nOn/Off Switch – Proper power cutoff to microcontroller and external sensors\n\nUF2 Bootloader – Drag-and-drop firmware updates; no special tools required\n\nDual Platform Support – Works with both Arduino IDE and CircuitPython\n\n\nIdeal For\n\nDriving the Adafruit LED Glasses front panel\nCompact wearable electronics and cosplay projects\nBluetooth-enabled sensor projects with motion and audio\nPortable I2C sensor hubs via STEMMA QT\n\n\nPackage Contents\n\n1× Adafruit LED Glasses Driver (nRF52840 Sensor Board)\n\n\n\nNote: This board has no GPIO breakout pins. LiPo charging is disabled by default — short the solder jumper on the back to enable it, and only use 4.2 V/3.7 V rechargeable batteries.\n\n\nResources\n\nUF2 Bootloader Guide\nTinyUSB Arduino Library (GitHub)\nnRF52840 Product Specification (Nordic Semi)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2958,"title":"Default Title","sku":"AF-5217","price":50.37,"on_sale":false,"in_stock":true,"available_quantity":4,"option1":"Default Title"}]}