ESP32 Doorbell and Liquid Metal Propulsion

Summary of my bookmarked links and videos from Aug 16th, 2023


  • Privacy friendly ESP32 smart doorbell with Home Assistant local integration

    Learn how to create a privacy-focused smart doorbell that integrates with Home Assistant via ESPHome. This DIY project offers customization and flexibility. You'll need an ESP32-CAM with a "flash/download/io0" button, a momentary push button, a 10k resistor, and an 8 RGB LED ring light or ESP32-CAM's built-in LED. Print the enclosure using PETG or ABS filament, and configure ESP32-CAM through ESPHome in Google Chrome. Add automation for snapshot notifications to your mobile when the doorbell is pressed. Assemble components, follow wiring guide, and achieve a functional smart doorbell system. Detailed instructions are available with the provided GitHub repo.


  • Magnetohydrodynamics - Propelling Liquid Metal with Magnets!

    Magnetohydrodynamics (MHD) explores the interaction of current and magnetic fields. Electric motors and generators operate on MHD principles. Conductive fluids or metals move in response to magnetic fields, showcasing propulsion and pumping possibilities. MHD finds applications in nuclear reactor cooling and unique fluid dynamics.