This $3 illuminated jeweler's loupe comes in handy
by Mark Frauenfelder from on (#M2NX)
Early this week I gave an online Arduino sensor workshop, and without this LED jeweler's loupe, I wouldn't have been able to read the tiny markings on many of the components. The battery has lasted for years. It's $2.72 on Amazon with free shipping even if you aren't a Prime member. I'm very happy with mine.