AVR-dat
legacy wiki page - https://w.electrodragon.com/w/AVR_Dev_Board
AT89
AT89C55WD - 8-bit Microcontroller with 20K Bytes Flash
repro
- https://bitbucket.org/e_dragon/attiny88
- https://github.com/Edragon/Arduino-attiny
- https://github.com/Edragon/AVR-attiny
- https://github.com/Edragon/MCU-AVR-ATSAM