Device for automatically switching-off the light in the bathroom (dressing) room designed to seamlessly allow the following everyday situations:
1. In that they serve the premises is unoccupied, the door is closed or locked from the outside the light is not lit.
2. Still in the bathroom (the toilet), no one. However, the door is open and there the lights are on. This situation occurs when you intend in the bathroom (the toilet) to take anything: for example, a rag or a bucket or perform a full clean.
3. Inside behind a locked door is a man and the light in this room should to be included (lamp is ЕL1).
Schematic diagram of the automatic control of lighting or bath toilet room, features its installation and use a latch instead of the microswitch SВ1 (click to enlarge): 1 - wall; 2 - door frame; 3 - lever bracket; 4 - l-shaped bracket; 5 - the microswitch MP7 or MP (2 PCs); 6 - relay unit; 7 - rod; 8 - the locking plate; 9 - Z-shaped bracket; material of parts POS. 3, 4, 9 - steel 1.5 mm sheet
Based on current case studies and relevant the sequence of automatic lighting control. In particular, the situation as outlined above under paragraph 2, logically leads to my proposed scheme (Fig. a) simple, clear algorithm, when the device (y many it is an ordinary bolt) locking a door, pressed the end of his the valve selector button SВ1 (Fig. b), thus providing a gap in the circuit of the coil of relay K1.
And what's with the "footer" SВ2? Contact pair 1 - 3 is open as from the push-button head reserved fixed to the door (which in this case, open) push the bracket. As a result, the relay is de-energized and lamp not included.
When the valve is moved to the other side to close the door from the inside, the pressure on the "spirality" button disappears. Under the action raspryamlyaetsya inner spring contact pair 1 - 2 SВ1 is closed, causing relay K1 to trigger. Lamp ЕL1 turns on and remains lit as long as the door again will not open. But there already is the prerogative of the "pin switch" SВ2. Like "spirality" SВ1, this is the microswitch type MP7 or MP. However, it is not SВ2 the door itself, and the angular bracket secured to the upper door jamb unit to be paired with retaining bracket to turn on the light when the bathroom (toilet) the room is open.
Both self-made parts to ensure proper and reliable fastening the functioning of the "pin switch" SВ1 made of 1.5 mm steel sheet. Tang push the bracket is bent at an angle of 45° to avoid damage to inadvertently push-button head when the door is closed.
Speaking at 55 mm above the plane of the door, the bracket provides a retention head "pin switch" SВ1 pressed together and the position of the microswitch creates its own kind of "dead zone" of the machine to the situation when the door due to someone's negligence is not fully closed.
It is also to be noted that with the commissioning of this device down the transformer is allowed to refuse to dip switch around latch. It and is clear: in the absence of dangerous stresses the latch can to serve as a switch (Fig. in). Such a machine is working properly from the author for more than a quarter of a century.