# Duonacci Pendant: Green and Blue LED Necklace The Duonacci Pendant: Where Engineering Meets Elegant Mathematics - **Seller:** [California STEAM](https://lectronz.com/stores/californiasteam), Stockton, California, United States - **Price:** $69.00 (USD, before shipping and taxes) - **Availability:** In stock - **Categories:** Wearables, Lights, LEDs - **Product page:** https://lectronz.com/products/duonacci-pendant-green-and-blue-led-necklace ## Images ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MjcsInB1ciI6ImJsb2JfaWQifX0=--363f81cc69405cd26e975a0b06ea22141b487888/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9345.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MjgsInB1ciI6ImJsb2JfaWQifX0=--a91c8ecadbde21cc47c26b472e8342243b620b04/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9349.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MjksInB1ciI6ImJsb2JfaWQifX0=--f1467247b6bbabf36ad9152a1335957c0d71fa44/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9364.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzAsInB1ciI6ImJsb2JfaWQifX0=--a6143035d8de79b61f2e3b2ffd822c182e144ef7/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9383.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzEsInB1ciI6ImJsb2JfaWQifX0=--1ad113d125296c35ac4ce50f547bd9e8628eaf1b/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9380.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzIsInB1ciI6ImJsb2JfaWQifX0=--63f2cb29e0252f235fa8d49d5cd7e99e2829b3f4/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9386.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzMsInB1ciI6ImJsb2JfaWQifX0=--a40727f4dd4fcb52756c123a18348bba1ea91cfa/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9392.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzQsInB1ciI6ImJsb2JfaWQifX0=--020db435bc86e1c8d2a6551d46ff56ea9c68fb2c/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9384.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzUsInB1ciI6ImJsb2JfaWQifX0=--9e086ba74199593b4f85bac95c80ea79f433f958/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9397.JPG) ![Duonacci Pendant: Green and Blue LED Necklace](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDE3MzYsInB1ciI6ImJsb2JfaWQifX0=--613a384fb74179ac9a51926d898df16ebe30fd14/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJKUEciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--a1419a086f227676aca33a49760ac51e58b523e3/2025-11-21T03-3A26-3A51.338Z-IMG_9401.JPG) ## Description The Duonacci pendants are an exclusive fusion of technology and art, designed for those who appreciate hidden complexity and dynamic color. As a piece of wearable PCB art, the intricate design is based on the captivating geometry of the Golden Angle and the Fibonacci Numbers, translating nature's own mathematics into a mesmerizing light display. Powered by an energy-efficient microcontroller and a supercapacitor, each pendant is a unique piece of tech-art. ### Dynamic Illumination: Bi-Color LEDs and Advanced Modes The Duonacci pendants feature 103 custom-placed bi-color LEDs (Geen and Blue) that can be mixed to achieve a vibrant spectrum, including beautiful teal and turquoise. This allows for a dazzling, dynamic display of color and customizable patterns, all driven by an AVR32DA48 micro-controller. ### Mode Selection and Power Management A push button on the back of the pendant is used to turn the pendant on/off or select modes. Hold the button for 3 seconds to enter sleep mode and turn the LEDs off. ![Duonacci Pendant in action](https://californiasteam.tech/images/Duonacci.gif "Duonacci pendant in action") Clicking the button while the pendant is on cycles through these unique modes: - Demo Mode: Patterns are shown in a fixed, mesmerizing sequence. - Random Mode: Patterns are generated by a random sequence generator. - 120 BPM Party Mode: Patterns update randomly at a 120 BPM rate, optimized for House Music. - Portal Mode: Spirals elegantly fade in and out with different color blends. - Fibonacci Sequence Modes (8 & 13): Patterns fixed to specific points of the Fibonacci sequence. - Fibonacci Wave Mode: Spirals cycle dynamically between sequence numbers 13, 34, and 21. - Fireworks Mode: A brilliant, energetic light burst display. ### Specifications Diameter dimension: **40mm (1-1/2")** Weight: **7.2 gram (0.25 oz)** Micro-Controller: **AVR32DA48** Capacitor: **90F 4.2V Hybrid Supercapacitor (LIC)** charging time: **6 minutes every 10 hours, or 8 minutes from empty** Run-time: Demo/party modes up to **16 hours**, Fireworks mode up to **days ...** ### Powered by Innovation: Hybrid Supercapacitors (LIC) The Duonacci pendants showcase my expertise in creating energy-efficient LED wearables. By utilizing Hybrid Lithium-Ion Capacitors (LICs) instead of traditional batteries, these pendants are an eco-friendly and high-performance choice. The LIC Advantage: Safety, Longevity, and Sustainability **Rapid Recharge:** Fully charged in just 6 minutes. **Extended Lifespan:** 50,000+ cycles without degrading capacity (vastly outperforming LiPo batteries). **Long-lasting Luminescence:** Up to 16 hours of dynamic color on a single charge. **Enhanced Safety:** LICs are more rugged, do not catch fire or explode, and only vent under extreme stress. **Eco-Friendly:** No safety or environmental concerns associated with rechargeable batteries. The entire wearable can be recycled with standard household electronics. ## Shipping policy See item details for estimated arrival times. Customs and import taxes: Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs. Cancellations: not accepted: Please contact the seller if you have any problems with your order.