Analog read..... incorrect values as high as 5v... help please

Thanks to everyone, I think this will become much more complicated than what I thought. Anyway I must continue one way or another. So Digital inputs its the way to go. and left analog reading for rpms and interior light dimmer.

So I must:

  • Protect the power input for my arduino.
  • Use all the on/off signals as digital inputs.
  • Knowing all the signal I will receive (Done) in fact my android app is already done so I know exactly which commands I need to send from arduino to android.

Do you guys think this is an easy arduinio project to be done by a man without eletronic experience or should I hire someone???