Always-on e-paper display, concept to a 5,000-unit run
An always-on e-paper display that pulls live data over Wi-Fi and spends the rest of its life looking like a printed poster. ESP32 module driving a 7.5-inch panel, schematic through to a production-ready release, plus the firmware. Raised $60k on Kickstarter, cleared FCC, CE and EMC, and is in a 5,000-unit run. Standby current decides the whole product, so the panel sits behind a load switch that cuts its supply entirely between refreshes and leaks ten nanoamps when off.