…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
WITH THE BOAT BEHIND
Not far off spring, and fans of water recreation are already thinking about the delivery of their "boats" to shore. Our reader B. Silvanovich built for these purposes special trailer:...
“Dancing” furniture set
The first impression when you look at this unusual furniture is that it probably isn’t very stable and is perhaps too fragile—not meant for the loads we usually expect from such...
