Arduino Uno - 2 Layers vs 1 Layer
Arduino Uno can be redesigned as a single layer board - , for simple circuit milling.
Running a Reprapdiscount Full Graphic Smart Controller with Uno
- Arduino Uno R3 Board from NKC Electronics via Amazon
- US Ship clone $10 Ebay - 
- Uno clone, $13 - Amazon - 
- US ship clone Ebay, $9.5 -