Blog of Wei-Hsiung Huang: Working with layers in Eagle PCB - using the Arduino Uno Stepper Motor Shield design from Shapeoko as an example.
![5V Input to a Digital Pin causes constant HIGH even when switched off - Motors, Mechanics, Power and CNC - Arduino Forum 5V Input to a Digital Pin causes constant HIGH even when switched off - Motors, Mechanics, Power and CNC - Arduino Forum](https://aws1.discourse-cdn.com/arduino/original/4X/a/8/d/a8d623f649619bb4b234223356ae926705a68941.png)
5V Input to a Digital Pin causes constant HIGH even when switched off - Motors, Mechanics, Power and CNC - Arduino Forum
![Arduino – ArduinoBoardUno (EAGLE files and schematic posted) « Adafruit Industries – Makers, hackers, artists, designers and engineers! Arduino – ArduinoBoardUno (EAGLE files and schematic posted) « Adafruit Industries – Makers, hackers, artists, designers and engineers!](https://cdn-blog.adafruit.com/uploads/2010/09/arduinounotop-1.jpg)
Arduino – ArduinoBoardUno (EAGLE files and schematic posted) « Adafruit Industries – Makers, hackers, artists, designers and engineers!
![b00m! Adafruit Eagle library, an Arduino package! « Adafruit Industries – Makers, hackers, artists, designers and engineers! b00m! Adafruit Eagle library, an Arduino package! « Adafruit Industries – Makers, hackers, artists, designers and engineers!](https://cdn-blog.adafruit.com/uploads/2010/02/ardeagle1.jpg)