Jewellery is meant to be shiny, so it’s the perfect place for multicolor NeoPixel LEDs! The trick is: how to get everything you need for a NeoPixel circuit to fit inside a small piece like a pendant. Enter the laser cutter! Laser cutters are great for precision cuts in materials like thin wood and acrylic. In this project, we’ll use a laser cutter to create a sleek necklace that shines bright with NeoPixels from Adafruit.
We’ll build the necklace in layers with precise cut‑outs to house our electronic components. Our favourite wearable microcontroller, Adafruit’s Gemma M0, will control the NeoPixels, and we’ll write a program in CircuitPython that will make the most of a tiny battery.
Interested in light up jewellery? See the Adafruit Learning System and let us know your interests in the comments below.
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.