Toilet arrangement. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Toilet arrangement. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Lighting

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Automatic turning off the light in the toilet has long been of concern to radio amateurs. Almost everyone forgets to turn off the light in the toilet. However, the "problem" is not completely solved, they forget about the "our smaller brothers" that live in most of our homes.

The figure shows a schematic diagram of the solution to the "problem".

(click to enlarge)

In parallel with the contacts of the toilet light switch SB1, neon bulbs HL1, HL2 and a similar circuit R3, HL2 are connected in series through the limiting resistor R4. Parallel to the HL1 lighting bulb, a three-phase exhaust fan motor M1 type VN-2 (used in the EC-1841 computer) is switched on. The necessary phase shift at a mains voltage of 220 V 50 Hz is provided by a capacitor C1 of type K75-10 0,47 μF 250 V 50 Hz.

When the light switch SB1 is turned off, the neon lights HL2...HL4 are lit. since they are connected to the network through the internal resistance of the toilet lighting bulb HL1 and the fan motor winding M1. Light bulbs HL2, HL3 are selected type 95SG-9 (maximum voltage 95 V and current 3 mA) and are located inside the toilet, illuminating it for cats. HL4 type MH-6 and resistor R2 are located in the case of the switch SB1, if the case is not translucent, a hole 4 0 mm is drilled in the case of the switch opposite HL4. Burning HL4 indicates that the toilet is free, the absence of burning indicates that the toilet is occupied or that the HL4 power supply circuit is broken.

When SB1 is turned on, the HL1 toilet light comes on and the M1 exhaust fan turns on. In the diagram, the dotted lines indicate the elements already standing in each toilet.

Replacing 95SG-9 neon bulbs with others is undesirable because of their lower brightness, different emission spectrum, and lower efficiency.

Replacing MN-6 is possible with a serial chain consisting of a diode, resistor, LED AL307V, AL307G. The green color of the glow of the LEDs is desirable, as it "semaphores" that the toilet is free. There are gas-filled green light bulbs, but they are larger in size and quite rare.

Instead of VM-2, you can use a fan of another type with a small size and with a three-phase or two-phase motor, for example, from old tape recorders and players. The use of a collector motor is undesirable because of the electrical noise it creates. Capacitor C1 can be replaced by K73-16 0,47 uF 400 V. Resistors R1 and R2 - any type, small.

The main psychological problem, to lure a cat into an unlit toilet, is solved by cat-specific red and infrared illumination of an unoccupied toilet with bulbs HL2, HL3.

Light bulbs HL2, HL3 are placed in the upper part of the "claw" rug, suspended behind the toilet, directly above the cat litter box. The rug is made on the basis of an unnecessary piece of linoleum. It is this basis that is very suitable for "clawing". So that the cat does not damage the bulbs HL2, HL3, they are closed with a lid.

PS In passing, I propose to place the serial circuit HL4, R2 in parallel with the contacts of your doorbell button, placing them inside the button, similar to placing them inside the SB1 switch. The neon light bulb MN-6, as the smallest in size, fits in a square button on the keyboard. Since the MN-6 does not have a base (panel), reliable hanging installation can be ensured by putting wire tubes on the PVC conductors, wrapping the conductors with a figure-eight thread directly at their exit from the light bulb housing, and then fastening the threads with nail polish. The place where the conductors exit from the glass is softly fixed.

Author: N.Ivashin, Minsk

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