There are 1 repository under attiny402 topic.
Small FM Radio with RDS and OLED
Rotary Encoder with I²C Interface
Simple Fitness Monitoring Device for your Pet Hamster
KiCad ATtiny84/x14/x02 (SMD) and ESP-01 (ESP 8266) PCB boards
A simple, ATtiny402 powered binary wrist watch. Sponsored by PCBWay
Lightweight WS2812B LED driver for use with letter boards and tinyAVRs