Dual Core Arduino For More Pins. 41 Comments . by: Brian ... September 13, 2012 at 7:11 pm ... When will the Arduino crowd realize that you can just take any 40 pin AVR mega, throw it on a ...

To set up the circuit, connect the central pin of the potentiometer to the analog pin 0, and the other two pins to the +5V supply and ground, respectively. The LED should be connected as in the first ...

You have to pull an extra wire from the sensor’s input voltage to your Arduino’s AREF pin, so you know what the actual voltage at the end of the cable is, so you can estimate the 10-90% range.