ACS712 5A AC / DC Current Sensor Module w/ Protection Board for Arduino - Blue + Black
Based on a current sensor module and based on the principle of the hall current which convert current into an analog voltage output; MCU (Arduino UNO R3) that includes AD converter can be read out and converted into measured current value; Suitable for SCM system powered by 5V power supply; Can measure AC and DC; Widely used in over-current detection current monitoring and other occasions.