…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
DOOR-STAINED GLASS
This original door for interiors is not difficult to manufacture, and apparently makes a very good impression. It consists of stick framing, assembled in the classical way — in spike....
GRIND JOINT
Someone with a electric drill, certainly useful attachment for grinding of parts with a large surface, for example, furniture panels, car bodies, hulls, etc. The details of the...
