THE LIGHT TURNS ON AUTOMATICALLY

THE LIGHT TURNS ON AUTOMATICALLY

In the apartment rang. And here in the dark hallway you groping to find the light switch and only then open the door. About the same thing you are doing, entering the house. Is it possible to turn on the lighting automatically, for example, simultaneously with a call or when opening the front door? It is possible by installing in the hallway, a simple electrical installation.

If you click on the bell button (Fig. 1) at the front door, it will immediately trigger relay K1, the contact of which their system K1.1 closes the electric circuit of bulb H1, located in the hallway. And the sequence circuit can include the diode VI to receive an incomplete (“standby”) lighting.
 
As soon as the call button is released the capacitor C1 gradually discharges through the relay coil K1, holding to 30 with its opposite. This time is usually enough to reach the light switch S2 set in the hallway.
The second device (Fig. 2) allows, in addition to switch on the lights when the door is opened when you returned home. Limit switch S3 is built into the door jamb. When it is open, relay K1 and capacitor C1 is charged. If you intend to stay in the hallway, press the light switch. Otherwise, after 30 seconds after you close the door, the hallway lights will go out.
 
Fig. 1
 
Fig. 1
 
Fig. 2
 
Fig. 2
 
Fig. 3
 
Fig. 3
 
In the third device applied to dual switch S2, allowing the lamp to translate from normal mode to “standby”. The switch S2 is installed in the room. If it is close, when the door is opened “konecnik” S4 will cause the relay K1, which their contact system K1.1 blocks S4 and includes both call B1, warning that the door is open.
 
All devices applied relay РЭН18 (passport RKH.564.510 N), C1 is connected in parallel capacitors K50-18, limit switch – BK-1.
 
The elements of each device with a call placed together in a plastic case the size of 230x190x80 mm, mounted in the hallway above the entrance door.
 
A. SCHWARTZMAN,
Vinnica

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