HEART-SHAPED LED CHASER
A heart-shaped LED chaser designed for our IEEE Student Branch.
Project Summary
The heart-shaped LED chaser is a small circuit designed to be a fun and interactive display piece for our IEEE Student Branch. It features a heart-shaped arrangement of 16 LEDs that light up in a chasing pattern, creating an eye-catching visual effect.
Project Details
The circuit is powered by an ATtiny85 microcontroller, which controls two SN74H595N shift registers to power the 16 individual LEDs. The LEDs are current-limited by 470Ω resistors to ensure safe operation. A 100nF capacitor is used for decoupling power to the ATtiny85.
Additional Features
The LED chaser includes a pause switch that triggers the reset functionality of the shift registers and the ATtiny85 microcontroller, allowing users to halt the execution until the switch is turned back on. When the switch is off, a 10KΩ resistor pulls these pins to ground. The circuit is powered by two CR2032 batteries in parallel, providing 3V and doubling the amp-hours of one coin-cell battery. Sockets are used to provide hot-swappable functionality and enable easy reprogramming of the ATtiny85 on the fly.
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