well, it's Christmas!!

I wanted to make something for the occasion, plus, I wanted to entertain my younger cousin with it. so I took a two-pin multicolour LED and a yellow one, and arduino uno and a breadboard and a couple of jumpers , and, voila, here is the christmas tree! as this is just a prototype it is crude and small, but you can improve it ! you can use this as a room decor.

EXPANDED TECHNICAL DETAILS

Programmable Holiday Illumination

This project builds a custom, 3D-illuminated holiday tree using high-density LED strips and customizable light shows.

• Charlieplexed LED Management: (Advanced version) Allows the Arduino to control dozens of LEDs using a minimal number of pins. The firmware uses high-speed multiplexing to create complex patterns like "Snowfall" and "Shimmer."
• User-Defined Pattern Matrix: The user can toggle between different light modes by pressing a physical button. The current mode is stored in the Arduino's EEPROM, so the tree remembers its pattern after a power cycle.

Aesthetics

• Organic Fade Synthesis: Uses a sine-wave PWM function to create soft, "glowing" transitions between colors, avoiding the harsh digital flashing of cheap holiday lights.