Attiny85 based Arduino compatible keychain game platform
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.


Attiny85 based Arduino compatible keychain game platform

Project page: Community photos and updates:

SSD1306 library courtesy of Tinusaur:

Video instructions:

If you have problems uploading large sketches — you need to update ld.exe in arduino\hardware\tools\avr\avr\bin


See documentation folder for DIY pcb, schematic and pdf instructions.

Parts list

  • 3D Printed Snap Case
  • Printed Circuit Board
  • SSD1306 OLED Screen
  • 4 pin 2.54 female header
  • CR2032 Battery
  • CR2032 Battery Holder
  • Pulldown resistor x2
  • Pushbutton x2
  • Attiny85
  • DIP8 socket
  • Piezo speaker
  • 10uf capacitor (used with arduino when programming Attiny85)

Games and sketches developed by Ilya Titov

Games developed by Andy Jackson

Visit Andy's repo and google drive for more info and sketches:

  • Wren Rollercoaster
  • Tetris
  • Space Attack
  • UFO + Stacker
  • UFO + Breakout
  • Bat Bonanza
  • Frogger

Other contributors

Breakout, the first game was created after much inspiration from the Tinusaur project: The screen control and font functions written by Neven Boyanov for the project Source code and font files available at:

Sleep code is based on this blog post by Matthew Little:

Alvin Starkey created great wooden variations of the game and contributed to the development. For more info visit his twitter feed @AlvinStar10.

@senkunmusashi Contributed to the creation of the Frogger game.