PROTO power meter - Measuring AC power with the Industruino PROTO

This project shows how to build an Arduino based electricity consumption monitor using the Industruino PROTO platform. We can use it to measure the power consumption of an AC appliance such as a water cooker, a TV, a laptop charger, anything you plug into a wall socket. Alternatively you can also use it in your electricity cabinet to measure the power consumption in your entire house (at least one phase). The challenge is to measure an alternating current (AC) of a relatively high voltage (220-240V) with our direct current 5V Arduino microcontroller. This may seem dangerous, but we will use a non-invasive Current Transformer (CT), so our Arduino remains galvanically isolated from the high voltage AC.”