…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
THE SHEATH FORK
Many piercing and cutting, cutting tools and tools have their own case or sheath (for safety). And worse than pitchfork? Often they are transported to the place of work, for example, on...
STRAPS LUGS
Which only tricks nor embark on the owners of automotive vehicles to prevent wheelspin, maximize traction from their mechanical helpers. Here and further weight gain traction at the...
