SparkFun
SparkFun LuMini LED Ring - 2 Inch (40 x APA102-2020)
The SparkFun LuMini LED Ring (2 Inch) features 40 individually addressable APA102-2020 RGB LEDs in a compact ring form factor. Each LED can produce over 16 m...
The SparkFun LuMini LED Ring (2 Inch) features 40 individually addressable APA102-2020 RGB LEDs in a compact ring form factor. Each LED can produce over 16 million colours, and the miniaturised 2 mm × 2 mm package allows for tight pixel density and a near-continuous ring of colour.
The ring is controlled via SPI (data + clock) through solder pads on the back of the board. Multiple rings can be daisy-chained by connecting the data/clock output of one to the input of the next. Eight detachable mounting tabs (four inside, four outside) can be used to secure the ring or broken off for more complex designs.
Key Features
- 40× APA102-2020 LEDs – Individually addressable RGB with 16 million colours
- 2 mm × 2 mm LED Package – High pixel density for smooth colour transitions
- SPI Control – Separate data and clock lines for reliable communication
- Chainable – Data/clock output pads for daisy-chaining multiple rings
- Detachable Mounting Tabs – 8 breakaway mounting points for flexible installation
- 5 V Operation – Powered via solder pads on the back
Specifications
- LED Count – 40
- LED Type – APA102-2020 (2 mm × 2 mm)
- Ring Diameter – 2 inches (~51 mm)
- Operating Voltage – 5 V
- Interface – SPI (data + clock)
Ideal For
- Wearable electronics and costumes
- Status indicators and visual feedback rings
- Art installations and decorative lighting
- Clock and gauge displays
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 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.
- RGB
- Short for red, green and blue, usually referring to an LED that can mix those three colours. It matters because controlling an RGB LED teaches how separate outputs combine to create different colours.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
Find this product in
Brands
LuMini 2 Inch Ring Schematic
Schematic · 99.9 KB · Click any page to view full size
APA102-2020 LED Datasheet
Datasheet · 7.7 MB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 473.6 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
