Arduino enthusiast Koltykov A.V. has created a relatively simple and accurate method of measuring power, voltage and current of a signal based around an Arduino and a small external circuit. Naturally an Arduino can't make the measurements itself, so the creator has used a ZXCT1010 high-side current sense monitor IC - which allows for an input voltage of between 2.5 and 20 V DC and current measurement up to 2 A. The voltage is returned via a simple resistor voltage divider back to an analogue input pin, and the current is returned via the IC to a second analogue input. The final calculatations take place in the sketch, with the results displayed on a graphic LCD, for example:
Naturally you can use other methods to display the data. This would be a handy project to add battery or power monitoring to projects or just as the basis for a different piece of test equipment on the bench. Either way, all the details are available on the project page. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
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