Arduino power meter based on the ACS 712 and the ADS1115

In this video I show you how to wire up a 128x32 OLED display, an ADS1115 AD converter and an ACS 712 Hall sensor-based current sensor with an Arduino Nano and use it as a power meter. These circuits are very simple to use, but I will show you a few trick that can make them even better. For example, by building a proper voltage divider, you can extend the original 0-5 V voltage range to 20 V like I did. Or, by calibrating the current sensor with another, reliable current meter, you can get accurate current readings.

The main motivation of the circuit is my Peltier experiments. I wanted to have a continuous log for my current and voltage values too. So, I will add some extra features to the demonstrated circuit and use it as a logger.

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Source code and wiring diagram: https://curiousscientist.tech/blog/ar...

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