This video shows how we can measure AC voltage using ZMPT101B AC Voltage Module sensor. The sensor provides an AC Voltage Waveform thus a program is needed to calculate the RMS value. The module may not support up to 250Vac as the waveform will start to distort seen on the Serial Plot. So modification is needed to be done in programming code. Although this module provide AC voltage waveform, it can also be used to find frequency. Further information such as power factor, phase angle and real power if used together with AC current waveform sensor.

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