I'm currently working on a school project that will control the amount of fuel going into an engine using a stepper motor and getting readings from an oxygen sensor. The oxygen sensor gives readings on voltage (0 to 5 volts). I currently have no clue on what is the best board to use for this project, I would probably would add an extra sensor but getting readings from the oxygen sensor to control the motor is my main concern. Thanks for your suggestions in advance.
You'd probably be fine with an Arduino Uno. Or if you want to experiment a little go with the chipkit Uno32. It's the exact same size and pin layout as arduino, but it has additional digital and analog pins and a beefier processor and more RAM. Unfortunately, not all the Arduino libraries are compatible with it at this point, so that's why I say it's a little experimental