I am looking to use an Arduino to perform a little logic on a relay. I would like to read the voltage off a serial port on a box and in to a pin on a Arduino and have the Arduino fire an output pin for a given amount of time. I would then have the output pin trigger a relay for another box. I’m decent with scripting and there are plenty of examples so I’m not worried about the code but I’m new to this and I am looking for advice on what Arduino I should purchase. Please offer your advice or details of any similar projects.