Snow man - sněhulák

thingiverse

Small Snowman: https://pihrt.com/electronics/332-attiny-85-small-snowman\r\nSMD-THT small snowman. The circuit powers a CR2032 3V battery. In sleep mode, the processor periodically checks for button presses every 2 seconds and possibly starts the LED diodes of the small snowman. All LEDs are controlled in Charlieplexing mode, and only one LED lights up at a time (although it may appear that three or more LEDs are lit).