hi friends i need help so my problem is i have to creat a machine to control electrovans with the value of ph, for exemple if ph>8 open electrovan 1 and if ph<8 open electrovan 2 ,it seems to be easy ,but no very easy ,so the problem as we know all the raspberry pi needs only an numeric input and ,i have analogic input because the value issue for ph meter is analogic .i have a proposition and i need to know if it is true or false ,my proposition is to use other electronic card that i well make in a ph probe and a OP with a gain 3.5 and a shunt regulator for the OP and the output of the OP will be the input of a CAN (ADC08031N) then i will conect the ADC08031N with the Raspberry pi
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