In the last post, I built another AC current measurement circuit with auto-ranging using Arduino uno and 50:5 current transformer, you can find post link below:ĪC Current Measurement using Arduino and Current TransformerĬurrent transformer (CT) is an instrument transformer which is used to step down current by the inverse of its turns ratio. No warranty is provided with this project, so do it at your own risk!Ī part of project circuit may be subjected to high voltage which is very harmful to human body, so be-careful! The current transformer (CT) used in this project has a turns ratio of 2000:1 and a rated current of 20A.Ī 1602 LCD connected to the Arduino board is used to display current values, the Arduino also sends the same values to the Laptop which can be viewed using serial monitor. This is another post that shows how to measure AC current using Arduino uno board and current transformer with TRMS calculations.
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