After some searches - unfortunately without answer - here I am, asking you some questions :)
I have a project which consists in giving me the consumption and production in real time for several energies (wind and photovoltaic, actually). In order to do this, I use several current sensors connected to an Arduino Uno rev3 (used as a A/D converter), which will be linked to a Raspberry PI and a LCD Screen (with Domoticz installed on this, to have an user-friendly interface).
Anyway, here are my questions :
Let's imagine that the solar panel produces a current of 20 amperes. We would have an analog current of 6.66 milliamperes from the current probe, knowing that the Arduino accepts a tension between 0 and 5 Volts... According to the ohm's law (V x A = W), with a 10 ohm resistance for example, we will have 0,0666*10=0,666V Is that sufficient, or is an operational amplifier necessary?
My current sensors are the following ones : http://shop.openenergymonitor.com/100a-max-clip-on-current-sensor-ct/ and http://www.econologie.com/shop/ecowatt-pinces-amperemetriques-pour-triphase-p-320.html?zenid=84669184cc352653e3618b468378ac89 (without the conversion) Where could we find the missing specifications for these current sensors?
Does the Arduino convert directly the datas collected (analog) if I connect the Raspberry PI on the Arduino's digital outputs ? In fact, how could I connect them together?
Thanks a lot by advance,