SparkFun

LilyPad Arduino USB - ATmega32U4 Board

Name: LilyPad Arduino USB - ATmega32U4 Board
Brand: SparkFun
SKU: SF-DEV-12049
Price: 64.6 AUD
Availability: InStock

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The LilyPad Arduino USB is a sewable microcontroller board built around the ATmega32U4 with native USB support — just plug in a micro-USB cable to program, n...

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The LilyPad Arduino USB is a sewable microcontroller board built around the ATmega32U4 with native USB support — just plug in a micro-USB cable to program, no external FTDI adapter needed. Officially supported in the Arduino IDE, it runs at 3.3V and features a JST connector for a rechargeable LiPo battery with onboard charging.

Designed for wearable e-textile projects, the LilyPad features large sew-tab pads for stitching into clothing with conductive thread. The thin 0.8 mm PCB and 50 mm circular form factor keep things compact and comfortable. An onboard power switch lets you turn off your project when not in use.

Key Features

ATmega32U4 – Built-in USB; program directly via micro-USB cable
3.3V Operation – Safe for wearable and e-textile projects
Onboard LiPo Charging – JST connector with built-in battery charger
Power Switch – Turn your project on and off easily
Sewable Pads – Large pads designed for conductive thread
Thin PCB – 0.8 mm thick, 50 mm diameter for wearable comfort
Arduino IDE Support – Officially supported from version 1.0.2+
Washable – Designed to withstand gentle washing

Ideal For

Wearable electronics and e-textile projects
Interactive clothing and costumes
Sewable LED and sensor projects
Learning Arduino with wearable tech

Specifications

Microcontroller: ATmega32U4
Operating Voltage: 3.3V
Diameter: 50 mm
PCB Thickness: 0.8 mm

Package Contents

1× LilyPad Arduino USB Board

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

conductive thread: Thread made with metal or other conductive fibres so it can carry electricity while being sewn into fabric. It matters for wearable and textile projects because it can replace wire, but it has more resistance than normal hookup wire.
IDE: Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
LED: A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
LiPo: A LiPo (lithium polymer) battery is a rechargeable lithium battery widely used in portable projects because it is light and compact. LiPo cells need correct charging circuitry and careful handling to stay safe, so equipment that supports LiPo generally includes charging or protection hardware suited to that battery type.
microcontroller: A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
native USB: Native USB means the microcontroller itself handles USB communication, rather than using a separate USB-to-serial chip. This matters for programming, debugging, and projects that need the board to act directly as a USB device.
PCB: A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
Thread: A low-power wireless mesh networking standard designed for smart home and IoT devices. It matters because Thread devices can relay messages through each other, helping build reliable networks for sensors and controllers.