…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
MY HOUSE – MY FORTRESS (PART 2)
Wall This popular English proverb builders could specify in relation to the construction of the building: its strength depends on three main components: Foundation, walls and roof. ...
FUNNEL DIVIDER
The hostess is often required to separate the egg yolks from the whites. For this purpose there are even special devices. If they are not at hand, it can help out ordinary funnel:...
