Monitoring water quality with Ardunio

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ImageIt’s been a busy week but I just laid out the components for the aquarium water quality monitor I am building, here we have Ph, conductivity and ORP. An additional RGB light sensor will be added shortly, but itsnt visible on the board here. The prototype board also has RS232 port connector so the 4 sensors can share pins 0 and 1 on the Arduino.
 
So now to get soldering!

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