Attiny85 based led Christmas ornaments, schematics and gerbers were produced using https://www.easyeda.com and pcbs were ordered from https://jlcpcb.com
2023 Fireplace with 4 charlieplexed leds and a WS2812b Neopixel, uses ATTINY85-20PU, powered by CR2032.
2022 Santa & Reindeer with 4 charlieplexed leds and a WS2812b Neopixel, uses ATTINY85-20PU, powered by CR2032.
2021 Snow flake with 12 charlieplexed leds, uses ATTINY85-20SU on add on board which is programmed using ICSP usbasp, can be powered by usb micro or CR2032.
2020 Candy Cane with 5 WS2812b Neopixels, uses ATTINY85-20SU on add on board which is programmed using ICSP usbasp, can be powered by usb micro or CR2032.
Can be cascaded to more and run off a single MCU
2019 Shooting Star with 5 WS2812b Neopixels, uses ATTINY85-20SU, powered by CR2032
2018 Snowman with 1 WS2812b Neopixels, 4 charlieplexed leds, uses ATTINY85-20SU, powered by CR2032
2017 Christmas tree with 10 charlieplexed leds, uses ATTINY85-20PU, powered by CR2032
The ATTINY85-20SU can be swapped for the ATTINY45-20SU