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I would like to present a small Christmas tree made from 15 WS2812B LEDs connected to attiny13 MCU. Tree is made from 5 stripes with 5, 4, 3, 2 and 1 LEDs. LEDs are driven from single pinout PB4 of Attiny13 MCU. Below is schematic:
MCU was put in cartridge from 35mm tape. As power supply I have used 5V from USB. Code is written in C with usage of light_ws2812 library. Below there is output from compilation:
There are five different effects for which we could modify brightness and delay. Below are few more photos:
Source code is available in attachment. Below there is short video presentation:
Second video recorded with different camera setting:
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