…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
DID NOT MEET EXPECTATIONS
Torpedo bomber TBD-1 Devastator. In 1927, for service with the us Navy received the first aircraft carrier of special construction — the Lexington CV-2 and Saratoga CV-3. Then, in 1934,...
“GENTLE” LAKE
For watering flowers in pots and the first weak sprouts of seedlings I have produced a gentle sprinkler system that gives a thin continuous trickle Effect is explained by the...
