Descriptions of homemade devices available for repetition at home by novice radio amateurs are presented. Power sources, timers, automatic controls for lighting, refrigerator, cell phone, home alarm, security systems, "baby monitor" and other structures for all occasions for the city and village, at home, garage and summer cottages are considered. Indicators of leakage, current overload, gas leakage sensors, fire alarm, parking, etc. are described. Practical advice and recommendations are given on the refinement and simple repair of cameras, scanners, phones and other household appliances. For a wide range of readers.