POC: digital question cards (e-paper)


  • Raspberry Pi Zero, combined with 1 rotary encoder
  • based on the conversation cards
    • small powerbank (fits in enclosure)
    • rotary encoder to change to question
      • rotate for random question, sourced from local .txt file (partial refresh screen)
      • push for full refresh screen as after some partial refresh some ‘ghosting’ appears
    • python script which autostarts on boot, which handles logic
  • Update 02/2021: see the Digital Question Cards post, with OLED HAT
Onno Ruijsbroek
Engineer | Maker