Originally posted to r/diyelectronics with 51 upvotes
I bought a 0.96” OLED from AliExpress last year and have been learning to display things with an Arduino. This season, I was able to turn it into an animated ornament for my coworkers at the wastewater treatment plant.
The TV case was 3D printed, the display is driven by an ESP32-mini, and it’s powered by an old wireless headphone battery on a 5V charge/discharge board. The display shows a basic WWTP with falling snow and falling poops in an endless loop. It runs at least 40 minutes on battery power.
A few more details and the arduino code are on my github: https://github.com/davenport651/ESP32-WRRF-Winter
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