A fluctuating AC current will induce a similar AC current in an adjacent wire. Aren’t electronics fundamentals wonderful? In this case, pass one wire conducting AC power through the middle of this coil and plug the sensor into your Grove system. Now you can read the current consumption with your microcontroller.

Note: This is an AC current sensor. Sorry, no measuring the current on a DC / battery powered circuit with this!

Specifications

• Grove compatible interface
• TA12-200 current transformer (2000:1 ratio)
• Maximum 5A input
• See sample code for math conversion functions

Links

• Electricity Sensor Wiki