Extruder Controller v2.1

This board is a combination of the PWM Driver Board, DC Motor Driver Board, Temperature Sensor Board, RS485 comms, and an Arduino! All on one board. It has screw terminals for easy hookup, as well as a power jack for power and an IDC header for the rotary encoder. Its an all-in-one solution for controlling an extruder.

Some highlights:

* Onboard atmega168 - program it just like an Arduino because it is an Arduino.
* 3 x MOSFET drivers for controlling up to 14A @ 12V. Perfect for h