/products/arduino/b/blog/posts/arduino-with-current-transformerHi! Does anyone has any experience with current transformer with arduino?I just bought a split core current transformer (SCT-0400-025) from Magnelab and I want to connect to arduino.According to the datasheet, the input current is 25A and output...en-USTelligent Community 12https://community.element14.com/products/arduino/b/blog/posts/arduino-with-current-transformerWed, 19 Oct 2016 04:37:34 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:2b01433c-6723-4659-838c-75b3288e1885Robert Peter Oakes1<p>As per the datasheet, it already has a burden resistor so does not need an additional one</p><p>&nbsp;</p><p>You will however probably need an op amp to boost the signal as your only going to get 0.333V at full 25A, this limits the ADCs range quite a lot. A 10x amplification would help a lot taking the input to the ADC to 3.33V, you could use more gain to increase output to close to 5V if your using a 5V reference on the ADC, if not then you will have to adjust to align with the ADC full scale.</p><p>&nbsp;</p><p>Also the output of the CT is not DC, it is AC so you will have to sample quite fast to profile the waveform, either that or use a diode and a cap to rectify the signal</p><img src="https://community.element14.com/aggbug?PostID=2124&AppID=145&AppType=Weblog&ContentType=0" width="1" height="1">