…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
POTS-UNIVERSAL
You presented a large bouquet or you bring one from your country area — where to put it? There is a beautiful crystal vase but it is too big Need something roomier And that can be on...
IN THE VAST RUSSIAN FIELDS
About halfway between Moscow and Yaroslavl lies an ancient Russian city Pereslavl-Zalessky. He is known not only as the cradle of the Russian fleet, but, as it turned out, their...
