The November/December 2020 edition of Elektor magazine offers a mixture of theory and practice that sets Elektor apart, and we will remain true to it in 2021. We present you with articles about the following and more: a new LCR meter, a review of Rigol's DG2072 generator, DIY home automation with Home Assistant and ESPHome, a differential current probe for a 'scope, the future of machine learning, an electronic Christmas candle, KiCAD plugins and modules, battery management, multitasking with ESP32, mobile apps for Android and iOS, and active analog filter design.