- Thu Feb 09, 2012 2:52 pm
yup, that's definitely a job Mr Thermocouple. An arduino is fine for doing ADC and other stuff. The AD or Max conditioning chips will work fine though they are all surface mount, afaik. There's an older chip the AD595 that comes in a dip package but it's like $15 from even a disti. If you are comfortable dealing with SMDs, go for it - a relative bargain. Maybe it's time to learn , if you aren't.
Basically, all you will be doing is reading analog inputs so any arduino will be fine if 10 bits of resolution works ok for you. There are plenty of sketches doing ADC. As for thermocouple conditioning. which ever chip you choose will have lots of application information in the datasheet. Pay attention to the junction information (temperature and specific metals involved) as it can affect your accuracy if you don't. But don't worry, it's all spelled out and I think the newer chips take care of a lot of the details. Wiring it up is pretty simple, the inputs connect to the thermocouple and the outputs go to the analog inputs of the arduino. From there it's just readAnalog. Sounds like a fun project.