The Arduino is a great way to build a custom ball-bot (or any hobby robot), but for something more simple and quicker, check out Lego Mindstorms NXT Robots. Posted by Unknown at 11:42 AM 12 comments Arduino digital pin 6 to Simple Motor Controller ERR Arduino GND to Simple Motor Controller GND There is nothing special about Arduino pins 3 through 6; you can use any free digital pins other than 0 and 1 (the Arduino’s hardware serial lines) if you change the pin definitions at the top of the sample program accordingly.
To interface the LCD Backpack to the Arduino, connect 5V and a ground pin on the Arduino to the 5V and ground pin on the LCD Backpack. This will provide the LCD and LCD Backpack with power. Note: The LCD requires 5V minimum to work properly. The next two connections are serial data and serial clock.