Sensing current using Hall Effect Current sensor ACS712 and Arduino

Browsing through Arduino projects on the internet recently I came across ACS712 current Hall sensor which can be used to measure current, it can measure both AC and DC current.I found it pretty cool so I ordered one, this post is about how we can measure AC/DC current consumed by the load connected to the power supply. So of the other applications of the sensor that comes to my mind are sensing if a device is on/off, measure instability in power supply, motor control, over current fault protection, etc.

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