…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
CONTROLLED LIGHT
If you need to smoothly adjust the light in the floor lamp, chandelier or table lamp, usually used autotransformer. However, this controller is bulky and low economical to exploit at. ...
LEVER HANDLED
One who is engaged in sawing wood, is constantly faced with difficulties and inconveniences that arise when a seemingly simple process — the clip blade in the jigsaw. Assistance here...
