The Crowtail Current Sensor Kit is based on Current transformers, it transforms the big AC current to little, and then convert to voltage with the build-in resistor so users can get the AC current value via measuring the output voltage with any microcontr https://elecena.pl/product/7560025/40-off-crowtail-current-sensor-kit-2-0 2017-02-01 https://elecena.pl/product/7560025/40-off-crowtail-current-sensor-kit-2-0 2025-12-17