Make your outfit shine with this customizable LED amulet. It packs a whopping 64 LEDs into a tiny space so you can go crazy with animations and effects, match any outfit, and twinkle like the star you are.
This is a fairly easy project that requires a little tight soldering, but no coding. The free, open-source WLED software does all the heavy lifting for you, and offers dozens of animations and color palettes to choose from, using a smart phone interface over your local WiFi network.
My enclosure is sculpted from low-temperature thermoplastic, giving a fun organic look to the necklace. The electronics could also easily be made into a hat topper or brooch. This little piece of sparkle is versatile and small enough to use just about anywhere you need some light and color.
The Feather ESP32 V2 board is not the smallest board we carry that runs WLED, but it's the best fit for this project. This board has an onboard JST connector to plug in a tiny LiPoly battery which will run your necklace for hours, and it features onboard battery charging -- so you'll never have to remove or replace the battery, you can just recharge it through the USB C port.
Be sure you get the Adafruit Feather ESP32 V2 board. There is an older Feather ESP32 board. This project makes use of the V2 board specifically.
The enclosure for this necklace is made from hand-moldable thermoplastic. It melts when it gets warm and then hardens as it cools into whatever shape you want.
I added a convex lens on the front of the matrix to give it a beautiful 3d appearance.
For wearables I always use silicone stranded wire. This wire is flexible, easy to use, and magically delicious. Get a few different colors to help keep everything straight while you're soldering.
Page last edited February 03, 2026
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