Which Arduino-Board do I need? I want to use a single Arduino board and link it to both the ANALOG CO2 GAS SENSOR (MG-811 SENSOR) and ANALOG PH SENSOR - METER KIT. I was wondering if the Uno Rev 3 had enough pins or do I have to go with the Mega.
Nano board has a bunch of analog and digital pins. It does good and cheap. But for convenience UNO board is preferable for its large size easy handling and easy pin and wiring management.