DIY Temperature controller + more features to come?

[rygh]

Correct @JVU , im doing this to satisfy a need i personally had, so its well within the scope

Also, I have access to a NIST temperature monitor, so its calibrated to within a tolerance of that.

What did you use for temp sensor?
And did you actually have to calibrate it, or was it good to go?
I used a Maxim DS18B20 which was absurdly precise at 12 bits, but I always wondered how accurate it was.