This news shows really detailed tutorial how to create robot which is based on Arduino platform.
This tutorial is step-by-step tutorial which describes you what components use, how to connect all components and how to write and upload code to Arduino.
You also find there how to make remote control and highlight posibility issues during the bulding of robot.

Homepage of project: https://blog.miguelgrinberg.com/post/building-an-arduino-robot-part-i-hardware-components