NEW PRODUCT – Adafruit Neo Trinkey – SAMD21 USB Key with 4 NeoPixels

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NEW PRODUCT – Adafruit Neo Trinkey – SAMD21 USB Key with 4 NeoPixels


It’s half USB Key, half Adafruit Trinket… it’s Neo Trinkey, the circuit board with a Trinket M0 heart and four RGB NeoPixels for customizable glow. We were inspired by some USB key flashlight boards that would turn any battery pack into an LED torch. So we thought, hey what if we made something like that but with fully programmable color NeoPixels? And this is what we came up with!

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The PCB is designed to slip into any USB A port on a computer or laptop. There’s an ATSAMD21 microcontroller on board with just enough circuitry to keep it happy. One pin of the microcontroller connects to the four NeoPixel LEDs. Two other pins are used as capacitive touch inputs on the end – if you look carefully you can see the slotted end has left and right touchpads. A reset button lets you enter bootloader mode if necessary. That’s it!

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The SAMD21 can run CircuitPython or Arduino very nicely – with existing NeoPixel and our FreeTouch libraries for the capacitive touch input. Over the USB connection, you can have serial, MIDI, or HID connectivity. The Neo Trinkey is perfect for simple projects that can use a few user inputs and colorful outputs. Maybe you’ll set it up as a simple status notifier, or stretch-break timer, or a macro keypad, or a random color generator, or, hey you could still make it into an LED flashlight if you wanted!

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We think it’s just an adorable little board, small and durable and inexpensive enough that it could be a first microcontroller board or inspiration for advanced developers to make something simple and fun.

  • ATSAMD21E18 32-bit Cortex M0+ – 48 MHz 32 bit processor with 256KB Flash and 32 KB RAM
  • Native USB supported by every OS – can be used in Arduino or CircuitPython as USB serial console,
  • MIDI, Keyboard/Mouse HID, even a little disk drive for storing Python scripts.
  • Can be used with Arduino IDE or CircuitPython
  • Four RGB NeoPixel LEDs
  • Two Capacitive Touchpads
  • Reset switch for starting your project code over or entering bootloader mode
  • Slim and cute, keychain-friendly!

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In stock and shipping now!


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

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