Adafruit
Fixed Address NeoPixel LED Fairy Lights - 100 Wired LEDs
These fairy lights use NeoPixel-compatible protocol and work with any NeoPixel library — but they behave differently from standard NeoPixels. Instead of acti...
These fairy lights use NeoPixel-compatible protocol and work with any NeoPixel library — but they behave differently from standard NeoPixels. Instead of acting as a daisy-chained shift register, each LED in this strand has a permanent pre-assigned address (0–100). When it receives data, it picks out its matching colour value and displays it. This means you can branch or parallel multiple strands and they'll all display the same data simultaneously.
The trade-off: you can't chain two strands end-to-end to extend the pixel count, and the addresses are fixed — you can't reassign them. But for parallel branch installations like hanging installations or tree lighting where you want multiple arms displaying the same pattern, these are ideal.
Key Features
- 100 LEDs – Pre-addressed 0 to 100, fixed permanently
- NeoPixel Compatible – Works with Arduino NeoPixel library, CircuitPython, and MakeCode
- Fixed Address Design – Ideal for parallel/branching installations
- LED Spacing – Approximately 100mm (4") per pixel
- Wire Type – Solid-core magnet wire; flexible but shape-retaining; non-conductive coating
- LED Enclosure – Milky white epoxy blob; nearly indestructible
- Pre-attached Connectors – Ready to connect; can also solder direct to wires
- Not Weatherproof – Keep dry; not suitable for outdoor wet environments
Wiring
- Red wire (coppery-red) – Power (5V)
- Middle wire – Data
- Remaining wire – Ground
Ideal For
- Branching or tree-style LED installations
- Parallel strands that display the same animation simultaneously
- Creative props, costumes, and decorative lighting
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- NeoPixel
- A type of addressable LED system where colour data is sent along a single digital data line from one LED or controller to the next. Compatibility matters because the timing and signal format must match for the lights or driver board to respond correctly.
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