Also included is the complete schematic diagram of the arduino uno revision 3. This arduino uno pinout diagram reference will hopefully help you get the most out of this board.

Arduino Uno Arduino Cnc Shield V3 0 A4988 Installation

Arduino Uno R3 Pinout Microcontroller Programming

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Arduino Cnc Shield V3 0 Wiring And Pinout

Arduino Nano Pin Diagram Features Pin Uses Programming