Here's how to make one: Put a small pinhole into a piece of paper ... You also shouldn't look at the eclipse through a camera lens, phone, binoculars or telescope, according to NASA, even while ...

I'll bet you have a cardboard box. That and a few common supplies will let you build a pinhole camera/viewer that you can use to see an eclipse or the Sun. Just follow the steps in the captions.

[ChickenCrimpy] adds the most basic of 35 mm cartridge to create what he calls the Minimum Viable Camera. It’s a half-frame 35 mm pinhole film camera with the simplest possible construction.

But perhaps the best known, if rather fiddly, way of watching an eclipse using pinhole projection is to make your own pinhole camera. “If you’re feeling crafty, you can build a box pinhole ...