…The baby was cranky for a long time and finally fell asleep. A few minutes later the doorbell rings. And, of course, the baby wakes up, and now to calm his unlikely…
I propose a simple addition to the doorbell. Just say that it’s good for calls that are switched through the circuit of 220 V. Here we need a cartridge with a bulb and the switch. Everything is connected as shown in the figure. In normal mode when you press the button is actuated and a bell, and a lamp in the “quiet” — only lamp.
I. GALKIN, engineer
Recommend to read
THE EVOLUTION OF THE BIAXIAL
From the history of the tram car. The fact that on the tram lines of the country "standard" rolling stock occupied by the end of 1930-ies a dominant position, does not mean that he was...
KITCHEN STAND
Many Housewives, especially beginners, are recipes for various dishes listed in the cookbook. So she was before my eyes, and not lying on the cutting table among the products, you can...
