Arduino LilyPad - An Arduino Which You Can Wear

Arduino Lilypad- Wearable Arduino
Arduino Lilypad- Wearable Arduino


Arduino LilyPad  is a MCU board designed for cloths that you wear and e-textiles products. It could  be stitched to fabric & similarly can be mounted on to power supply, sensors with a conductive thread. The board is based on the ATmega168V (its actually a low-power version of the ATmega168) (datasheet) or the ATmega328V (datasheet). The Arduino LilyPad was designed and developed by Leah Buechley and SparkFun Electronics.

Downloads (Courtesy

Schematic: LilyPad_schematic_v18.pdf
EAGLE (CAD) Files:

Arduino Lilypad in Action-Stiched On The Fabric
Arduino Lilypad in Action- Stiched On The Fabric


Warning: Don't power the Arduino LilyPad with more than 5.5 volts, or plug the power in backwards: you'll probably kill it.
MicrocontrollerATmega168V or ATmega328V
Operating Voltage2.7-5.5 V
Input Voltage2.7-5.5 V
Digital I/O Pins14 (of which 6 provide PWM output)
Analog Input Pins6
DC Current per I/O Pin40 mA
Flash Memory16 KB (of which 2 KB used by bootloader)
EEPROM512 bytes
Clock Speed8 MHz


The Arduino LilyPad can be programmed with the Arduino software IDE (download).
*Note*, the LilyPad Arduino should only be programmed with software versions 0010 or higher. You can program it with earlier versions, but all of the time related functions will be off (twice as slow as they should be).
The ATmega168V or ATmega328V on the Arduino LilyPad comes preburned with a bootloader that allows you to upload new code to it with the Arduino software. You can also bypass the bootloader and program the ATmega through the ICSP (In-Circuit Serial Programming) header.


The LilyPad Arduino can be powered via the USB connection or with an external power supply.
If an external power supply is used, it should provide between 2.7 and 5.5 volts. This can come either from an AC-to-DC adapter or a battery.

Physical Characteristics

The LilyPad Arduino is a circle, approximately 50mm (2") in diameter. The board itself is .8mm (1/32") thick (approximately 3mm (1/8") where electronics are attached).

Washability(Even That Is Possible With This!)

Wash at your own risk - we do ;). We recommend washing projects by hand with a mild detergent. Drip dry. Make sure you remove your power supply first!

More Information

SparkFun Electronics has a range of accessories for use with the LilyPad Arduino.

Information source :