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I am impressed after reading this wonderful instructable.. I am building a similar project by following theinstructions on your page. However, I am getting some weird readings. I am getting my angles as:143, 153, 146 etc and my pf_max goes negative then. Of course, I can take justthe magnitude but just wanted to know if it’s possible?I’m using this circuit for getting myvoltage: https://circuitdigest.com/microcontroller-projects/arduino-ac-voltmeterAnd I have a https://www.maglab.ch/products/sct-t16/(100A/333mV) CT, which I am feeding directly to my opamp. And then taking output of these two andfeeding into my XOR gate. And then running your code on Arduino ide using aArduino Nano on pin D4. Does this arrangement look right to you?I would really appreciate your help.