A LilyPad-compatible microcontroller board based on the ATmega32U4, designed for e-textile and wearable electronics projects. The built-in USB communication allows the board to appear as a mouse, keyboard, or virtual serial port when connected to a computer — no separate USB-to-serial adapter needed.

Features a Micro USB connector for programming and power, plus a JST connector for a 3.7V LiPo battery. The sewable form factor and 3.3V operation make it ideal for fabric-based circuits.

Key Features

• ATmega32U4 – Built-in USB with HID (keyboard/mouse) support
• 3.3V / 8 MHz – Safe for e-textile applications
• 9 Digital I/O Pins – 4 PWM outputs, 4 analogue inputs
• Micro USB – Direct programming and power
• LiPo Battery Connector – JST connector for 3.7V batteries
• Sewable Design – LilyPad-compatible form factor

Specifications

• Microcontroller – ATmega32U4
• Operating Voltage – 3.3V
• Input Voltage – 3.8–5V
• Digital I/O – 9 pins (4 PWM)
• Analogue Inputs – 4
• DC Current per Pin – 40 mA
• Flash Memory – 32 KB (4 KB bootloader)
• SRAM – 2.5 KB
• EEPROM – 1 KB
• Clock Speed – 8 MHz

Package Contents

• 1× LilyPad Compatible USB Board (ATmega32U4)