…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
MOPED IN THE HANDS OF A CRAFTSMAN
The owner of a light moped (or, according to modern classification — a mo-vel, that is, a motorized bicycle), equipped with a D-8 engine, eventually notices that their two-wheeled machine...
BOARD ROOM “WEEDING”
It is now customary to control weeds on the beds without chemicals. Weed or often just cover the beds by the opaque material beneath the weeds do not develop, and the seedlings planted...
