…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
BOTTLE SCOOP
Found another use for plastic bottles of carbonated drinks. Should trim it as shown in the figure, and turns out to be convenient scoop for bulk products - flour, sugar or cereals.
DRANK, SAW!
For the workman man a good tool — it is, as they say, is half the battle. For cutting tools (e.g., saws) it is important that it was sharp. With a significant amount of grinding you have...
