…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 SECOND LIFE OF KMD
Not everyone from the acquired samples of the Microdrive brand of KMD-2,5 can be considered excellent. The only work of domestic "diesel", despite the instability of quality of...
MODEL-A COPY – OF A SET OF
In the last decade popular form of modeling the guys is to build plastic models-copies of ready sets. And it is clear. No need to look for scarce materials and components - almost...
