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Post: If you are measuring the input to your computer then I would assume that would be an AC power line. For measuring AC I would recommend using the [url=https://www.elkor.net/product/i-Snail-VC]iSnail current sensor[/url] which has an output of 0-5V. This can be connected to our [url=/p/69/adc-pi]ADC Pi[/url] board to measure the voltage and convert this to the current being used. We have used the iSnail sensor on our own projects before and it is the simplest way of measuring AC power. An alternative which would use lower-cost parts would be to use an Arduino board and a CT current sensor and with a few passive components you can use this to capture the data from the sensor and it would output as a serial device to your host computer via the USB interface. There is an example of this on [url=https://docs.openenergymonitor.org/electricity-monitoring/ct-sensors/interface-with-arduino.html]Open Energy Monitor[/url].