Useful and interesting. Page 81

It is not always possible to buy a barometer, so I would like to propose the design of a home barometer that will show atmospheric pressure with some accuracy.

We make an airbrush from available parts. . .

If you don’t have a tripod at all or are too lazy to carry it with you all the time, then this homemade product is for you. This very simple device will help make photos clearer in low light conditions. Of course, this is not a panacea for blurred

This “liquid” consists of tiny particles of matter that are attracted by a magnet. . .

Most people have an old refrigerator in their garage or shed. Why do they store it? unknown! If you are one of those people, then I suggest using this “hardware” for business. . .

The eternal problem - what to do with old CDs? It's a shame to throw it away. . . Here's an idea - an original stand for various office supplies.