- The device uses a 1000:1 voltage current transformer.
- The output of this transformer has a 200 ohm resistor across its output.
- The AC current is calculated by measuring the voltage drop across the resistor.
- This 5A AC current Sensor requires two connections to your Arduino and it requires you to run the wire that you wish to measure current on through the center of the current transformer.
- It is particularly useful when measure current at line frequency.