When you think of Raspberry Pis, on the other hand, you immediately picture a computer where ... it's only slightly larger than Arduino's smallest board, the Nano, at 51 mm x 21 mm.

Read more: Major PC Monitor Brands Ranked Worst To Best The board that started Arduino's Nano family, the Nano is a classic platform ideal for basic circuit building and breadboard prototyping.

One way around this issue is to take several slices at different focus points, and then stitch the photos together digitally ... a carriage up or down. An Arduino Nano acts as the brains, a ...