Arduino BGA Rework Station PID Controller

Code for Arduino based BGA Rework Station PID controller using a solid state relay and a k-type thermocouple.

This controller has several functions:

1. It reads the temperature from a k-type thermocouple amplified by a MAX6675 amplifier
2. Compares the input temperature with a desired temperature and uses a PID controller library to calculate the on time of a heating element to correct it.
3. Uses a solid state relay to turn on/off the actual heating element
4. Communicate with a PC through serial console to receive bga profiles (NOT FINISHED)

The code is based on the work by Norcal Reballer from the http://bgamods.com forum and his code helped me a lot to understand how PID controllers should work.

This is not a finished product. This software is a part of a bigger plan for building a BGA rework station, consisting of the station itself, controlled by an Arduino running this software and a Java desktop application for command and control. Here is the partly working station:

There is still work to be done (and probably bugs), but maybe someone will find use for it.