Test fitting the robot

I recommend test fitting before actually ordering parts. The test fit helps a builder be more confident that components fit, and you'll know roughly where these parts go. This step saves you time and money later.

You can use paper and a pen for test fitting, or an app such as diagrams.net. First, I find the dimensions for all the parts. Figure 6.15 has a screenshot from Amazon showing how to spot product dimensions:

Figure 6.15 – Finding product specifications

Some information-digging is needed to find these for your parts. For each, first find a shop you can buy them at, such as Amazon, several online shops, or eBay. You can then search for or ask for information about the dimensions of each board or item. Make sure you are looking at the dimensions of the part and not its packaging:

Figure 6.16 – A battery box product drawing with dimensions

You can find diagrams like the battery box in...