Hi guys, I want to sense about 4 temperatures in a vehicle (say inside, outside, engine and beer fridge). It rarely goes below 0 degrees where I live.
Which is the best temperature sensor LM35 or 1 wire? I am trying to decide what is the best way to go.
I have played around with an LM35 and wrote some stuff that sent the temperature back to Road Runner Car PC front end fairly easilly.
To get a full scale reading out of the LM35, you have to add a negative power rail and then add a voltage to make sure the range is positive for the Arduino to sense. I have found some circuits to do this but I am no electonics guru. I have considered making an LM35 sensor shield with all this stuff on board but am uncertain if I have the skills to do this. Software is not really an issue, I understand C quite well.
I know the one wire system has a library on the playground and has the advantage of using less ports which might be a good idea.
So some info on the pros and cons of the two sensor typres would be appreciated before I rush in and get into trouble.