Learn the basics of surface-mount (SMD) soldering by assembling a beating heart LED pendant. The heART kit takes about 20–40 minutes depending on your skill level and provides a fun, achievable challenge for practising and improving your soldering technique.

The completed pendant features an ATtiny85 microcontroller that drives SMD LEDs in a heartbeat pattern, powered by a CR2032 coin cell battery. Left on continuously, the battery lasts over a week — much longer if switched off when not in use.

Key Features

• SMD Soldering Practice – Learn surface-mount techniques on a real project
• Beating Heart Animation – ATtiny85-driven LED heartbeat pattern
• Wearable Pendant – Heart-shaped PCB designed to be worn as a necklace
• On/Off Switch – Conserve battery when not in use
• 20–40 Minute Build – Achievable for beginners with basic soldering experience

Package Contents

• 1× Heart-shaped PCB
• 1× CR2032 SMD battery holder
• SMD LEDs
• Capacitors
• 1× Switch
• 1× ATtiny85 microcontroller