The Rainbow LED Ring V3 features 12 individually addressable SMD RGB LEDs arranged in a ring, each controllable for brightness and colour. It comes with a pre-loaded bootloader containing several built-in LED animation scripts, so it works standalone without an external microcontroller.

Built around an ATmega168P, the ring can be programmed via the Arduino IDE (using the LilyPad board profile) through an FTDI breakout board. It supports I2C and serial communication, and multiple rings can be daisy-chained via I2C to create larger LED displays and art installations.

Key Features

• 12 RGB LEDs – Individually addressable SMD LEDs with per-LED brightness and colour control
• Standalone Operation – Pre-loaded animation scripts play without an external MCU
• Arduino Compatible – Program via Arduino IDE with FTDI breakout
• I2C Daisy-Chaining – Link multiple rings together for larger displays
• Two Push Buttons – On-board buttons for mode selection
• Firmware Upgradable – Update via Optiboot bootloader

Specifications

• MCU – ATmega168P
• Bootloader – Optiboot (Diecimila)
• Arduino Profile – LilyPad
• LEDs – 12× SMD RGB
• Interface – Serial, I2C, digital pins
• Supply Voltage – 5 V
• Diameter – 61 mm
• Buttons – 2× push buttons

Package Contents

• 1× Rainbow LED Ring V3
• 5× 90° pin headers
• 2× Straight pin headers
• 1× Jumper wire

Resources

• Product Wiki
• Arduino Library (GitHub)