Summary
In this chapter, you've now learned how to choose the parts for a robot by reasoning and making some important design decisions. You used a simple tool to test fit these parts and see what works before buying anything. Finally, you bought the parts and built your starting robot platform.
By considering the trade-offs and test fitting again, you have gained skills for planning any hardware project, including finding dimensions on the datasheets/vendor websites, making a simple test-fit sketch, and considering how the parts will interact together. You've learned how the size of a robot affects motor and controller decisions. You've seen how to make parts easy to remove using hook and loop tape and considered other options for this.
By hooking up independent power, and connecting the motors, the robot has the hardware it will need to drive itself around without being tethered to a wall. What it doesn't yet have is any code to move with. In the next chapter...