Adafruit FLORA v3
Round, sewable Arduino-compatible wearable platform with ATmega32u4, native USB, NeoPixel, JST battery connector, and alligator-clip-friendly pads in a 45mm diameter form factor.
$14.95
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Specifications
Components
8-bit AVR microcontroller with native USB at 8 MHz, 32KB flash, 2.5KB SRAM — same chip as Arduino Leonardo
Addressable RGB LED integrated on board, programmable via single-wire protocol
Bus Interfaces
GPIO Map
Overview
The Adafruit FLORA v3 is a round, sewable Arduino-compatible microcontroller designed specifically for wearable electronics. Built around the ATmega32u4 at 8 MHz with 3.3V logic, the FLORA prioritizes ease of integration into fabric-based projects — featuring large, solderable pads spaced around a 45mm circular PCB that accept conductive thread or alligator clips (a v3 addition).
The board includes built-in USB via the ATmega32u4's native USB controller, supporting HID (keyboard/mouse emulation) and virtual serial communication without an external bridge chip. A JST connector accepts standard LiIon/LiPoly, LiFe, or alkaline batteries, and a 2A FET-controlled on/off switch protects the circuit. Polarized connectors and Schottky diodes prevent damage from reversed battery connections.
Version 3 (July 2016) added alligator-clip-friendly pads and updated silkscreen for improved usability. The onboard programmable NeoPixel RGB LED (added in v2) enables visual output without additional hardware. The board can drive up to 50 NeoPixel LEDs directly, or 500+ with an external power supply.
With 14 sewing attachment points, four status indicator LEDs, a reset button, and an ICSP connector for advanced reprogramming, the FLORA v3 is a complete wearable development platform supported by dozens of Adafruit tutorials covering LED accessories, GPS wearables, and interactive costumes.
Use Cases
5Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
E-Textiles
Electronic textiles integrate circuits and microcontrollers into fabric for smart clothing, wearable sensors, and interactive garments.
Prototyping
Rapid hardware prototyping and proof-of-concept development with breadboard-friendly form factors and accessible development environments.
Education
Teaching programming, electronics, and computer science concepts. Popular in schools, universities, and coding bootcamps.
maker
Where to Buy
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