…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
ON THE ICE — IN TOW
The tug skater that I have built and offer to readers, is characterized by simplicity, reliability and high maneuverability on the ice. It can be made of the most abundant materials and...
MICROTRACKER “BEE”
Almost from childhood read the magazine "modelist-Konstruktor". It has taught a lot of information about new designs, interesting ideas. Inspired by the publication in the journal, while...
