Fascinating home electrical engineering

The progressive Soviet teacher-innovator Valery Ryumin was the author of original teaching methods. One of its main principles was in an interesting and entertaining form, both lighter and complex topics are most accessible and in detail as possible. And even at first glance, the objects in his presentation became incredibly interesting at first glance. His manuals are equally interesting for both schoolchildren and adults, because there is a lot of useful information that can be useful in everyday life. This publication is an original text released in 1929. The author describes the technology of creating simple devices that help readers master the basics of electrical engineering. We are talking about the transformation of current, the use of blocked lamps, economical lighting of rooms, home -made heating devices, the simplest radio receiver, and much more