No prizes for guessing the first thing you'll need: a microscope. But don't worry if you don't have one of your own. Ask your school if they have one you can use. Then you'll need an onion.

Researchers at the University of Strathclyde have made a 3D printed microscope which could help democratize access to ...

test and debug SMD circuits using parts as small as grains of sand. We have seen a lot of stereo microscope hacks here at Hackaday, so it helps to take a look inside one to understand how they work.

The microscope meanwhile is designed to bring objects ... in your field toolkit alongside your miniature soldering iron, and use the mobile phone instead as its display. Everything is worth ...