The LilyTiny is a compact LilyPad board with a built-in ATtiny85 microcontroller that drives four pre-programmed LED patterns. Simply sew on four LEDs and connect a battery — no programming or main board required.

Each of the four output pads produces a different lighting effect: heartbeat pulse (pad 1), on/off blink (pad 2), breathing fade (pad 0), and random fade (pad 3). Advanced users can reprogram the ATtiny85 via the ICSP pads on the back of the board.

Key Features

• ATtiny85 Microcontroller – Pre-programmed with four LED patterns
• No Programming Required – Connect LEDs and a battery to get started
• Sewable Pads – Large conductive pads designed for sewing into textiles
• Reprogrammable – ICSP pads on the back for custom firmware
• Ultra Compact – 20 mm diameter, 0.8 mm thin PCB

LED Patterns

• Pad 0 – Breathing fade
• Pad 1 – Heartbeat pulse
• Pad 2 – On/off blink
• Pad 3 – Random fade

Specifications

• Microcontroller – ATtiny85
• Diameter – 20 mm
• PCB Thickness – 0.8 mm
• Output Pads – 4

Ideal For

• Wearable e-textile projects
• Light-up clothing and costumes
• Beginner-friendly LED crafts
• E-textile education

Package Contents

• 1× LilyTiny board

Resources

• Schematic (PDF)
• Eagle Files
• Reprogramming Guide
• Arduino Source Code
• GitHub Repository