The LilyPad USB ATmega32U4 Development Board is a compact, sewable microcontroller board designed for wearable electronics, smart clothing, and interactive textile projects. Powered by the ATmega32U4 microcontroller, it supports Arduino programming and offers built-in USB communication for convenient code uploading without requiring a separate USB-to-serial adapter.

Its circular, low-profile design features large conductive connection pads that allow the board to be integrated into fabric using conductive thread or connected with wires. The onboard JST battery connector supports a compatible 3.7V LiPo battery, while the integrated charging circuit allows battery charging through USB on supported board versions.

With digital I/O pins, analog inputs, and PWM outputs, the LilyPad USB can interface with LEDs, sensors, and other electronic components. It is suitable for wearable technology, educational projects, prototyping, and creative electronics applications. 

Key Features

• Microcontroller: ATmega32U4
• Operating Voltage: 3.3V
• Clock Speed: 8MHz
• Flash Memory: 32KB, including bootloader space
• SRAM: 2.5KB
• EEPROM: 1KB
• Digital I/O Pins: 9
• PWM Outputs: 4
• Analog Inputs: 4
• USB Interface: Micro-USB for programming and power
• Battery Connection: JST connector for a compatible 3.7V LiPo battery
• Power Management: Onboard power switch and battery charging circuit on supported versions
• Design: Circular, low-profile PCB with sewable connection pads
• Programming: Compatible with the Arduino IDE 

Applications

• Wearable electronics and smart clothing
• Interactive textile projects
• LED-based clothing and accessories
• Sensor-integrated garments
• DIY Arduino projects
• Portable electronic devices
• Educational electronics and STEM projects
• Creative prototyping and e-textile development