Adafruit TRRS Trinkey - USB Key for Assistive Technology

It's half USB key, half TRRS breakout—the Adafruit TRRS Trinkey stands as the ultimate tool for assistive technology hackers and creators. Blending simplicity with flexibility, this device caters to a spectrum of needs in a compact form. Its TRRS jack, complemented by the full connectivity of all six pins, offers unparalleled input and output versatility.

Connect standard 3.5mm plugs—be it mono TS or stereo TRS—to easily craft customized switches or variable inputs. With a clever use of a stereo/mic splitter, transform it into three simple switches or two analog potentiometers, elevating user engagement. Robust through-hole contacts ensure a solid mechanical connection for extended durability.

The embedded ATSAMD21 microcontroller paired with a NeoPixel LED offers dynamic programmability, easily handling CircuitPython or Arduino. Quick code updates via UF2 bootloader and drag-and-drop make personalization seamless. Experience multifunctional USB connectivity as the Trinkey doubles as a serial, MIDI, or HID interface.

Technical Specs: a 32-bit Cortex M0+ processor, 256KB Flash, and 32KB RAM assure high performance. Enjoy full customization with open-source hardware, a reset switch for reboot or bootloader access, and a STEMMA QT port for additional I2C or input extension.