Step 3a : Construct the Controller
Notes and Modifications:
This section is probably the hardest for someone building the $50 Robot Controller and probably the easiest for someone using the Roboduino.
You can basically disregard this entire section. Just know that this is how you plug in a battery into the Roboduino. Heres a picture of how to connect it.
You must also set the power jumper to be external power. Just follow this diagram and set the Roboduino to be powered by External Power Input.