Three switches and one bulb
[email protected]: Riddle about 3 light bulbs
call an assistant), since he himself can’t do anything ....
Break the wall into the basement with your head, so you can see!!
turn on the flashlight
We turn on one switch, wait for a while (say, 5 minutes), turn it off and turn on the other, after which we go to the light bulbs. We left one switch on - the corresponding light is on, of the remaining ones, the one that was on recently will be noticeably hotter than the one that has been turned off all this time. The one that is hot corresponds to the switch that we turned on and then turned off, the remaining one corresponds to the switch that we did not touch at all. everything ingenious is simple.
open the switch connect the diode. turn on one. leave one off. through the diode to the glow floor it will not be a fact that they will reach the lamps
Turn on toggle switch 1 for a while. Turn it off. Turn on the toggle switch number two and go to the basement. A burning light bulb is connected to toggle switch 2, this is obvious, we did not turn it off. You touch the two remaining lamps with your hand. A warm bulb (just on) is number 1. A cold bulb is number 3.
Turn on 1 switch, turn on the second for 5 minutes, then turn it off, leave the third one alone. Going into the basement, touch the light bulbs. the one that is hot, but does not burn - the second number, 1 number is on, the third one, respectively - no))) right? We were taught logic and ingenuity, sometimes it helps)
Before entering, turn on 2 bulbs at once, for example, 2 extreme ones, go in, unscrew 1 of the burning bulbs (it will be clear which switch refers to a non-burning lamp, which, logically, to unscrewed)
TOO COMPLEX
uhm I didn't forgive that :(
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You have a light bulb in your room, there are 3 switches behind the door, how do you know which switch is needed for the light bulb?
The riddle is old. Press the first switch and go for five minutes. Enter, turn off the first, turn on the second. If the light is on, it's the second one. If the light is off and it is hot, this is the first one. And if it does not burn and is cold, this is the third.
well, if it is given only once, then it is better to press three keys at once ...
don't close the door
walk out the door, but don't close it. press all three switches in turn and watch when the lamp lights up then enter
Enable three at once.
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We have two rooms, in the 1st one there are three switches, and in the 2nd one there is one bulb - 5 April 2015 - Blog
We have two rooms, in the 1st one, there are three switches, and in the 2nd one, one light bulb.
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The expediency of using walk-through switches is due to the individual layout of the room with lamps that require adjustment from various points. Thus, additional conveniences and comfort are provided. IN similar cases quite often, a three-way switch connection scheme is used. If necessary, it is possible to use large quantity points.
Using three-switch circuits
The use of a light control system with three switches makes it possible to turn on and off the lighting from any convenient place. Passage switches have proven themselves well on flights of stairs, in large rooms, porches, as well as in the yard or in the backyard.
In long corridors, several switches are installed, at the beginning, in the middle or at the end. The same scheme is used if there are several entrances to different rooms. That is, at the beginning of the corridor, the light can be turned on, and in the middle or at the end, it can be turned off. In order for the lighting device to turn on and off from three different points in the room, it is necessary to use a connection scheme with three pass-through switches.
Elements and components of the connection diagram
This circuit includes a junction box, lighting, switches and wires. Not only conventional incandescent lamps are used as light sources, but also different kinds LED and energy saving lamps. The switches used in the circuit are divided into through and cross. In turn, pass-through switches can be toggle, redundant or ladder. Their installation takes much more time compared to.
The classic scheme for connecting a pass-through switch from three places requires the use of two and one cross. Appearance duplicating devices is almost the same as that of a single-key device. In any position of the keys of such a switch, the connection electrical circuit is not interrupted, only switching of contacts takes place. The switching mechanism in the walk-through switches is located in the center of the contacts.
Devices can be one- or two-key. In the second case, two devices are combined into one with six contacts. The circuits often use single-key light switches that do not differ from each other. Each of them is equipped with three contacts. At the first device, a phase wire is connected to one contact, and intermediate wires to the other two. At the third switch, on the contrary, an intermediate wire is connected to one contact, and the output phase lines are connected to the other two.
The switch installed in the middle acts as a cross switch. It has four contacts, from which two wires go to each toggle switch No. 1 and No. 3. If the intermediate electrical wire is shorted on any of the toggle devices, the light will turn on. When the state of the key changes, the circuit breaks and the light goes out. If there is a need to increase the number of light control points, it is enough to add cross switches to required quantity to the existing circuit.
For correct execution installation of the control system, certain recommendations must be observed. If there is already an electrical network in the room, then separate networks of an open or closed type. In the second case, you need in the walls. May need special tool and building plaster for fastening the corrugated pipe. Laying of new lines is carried out with a three- or four-wire cable.
How to connect a 3-way pass switch
Imagine that you are standing in front of a closed room in which there are three light bulbs and they are all on. this moment off. In addition, there are three switches in front of you that are responsible for any of the light bulbs. You can turn the lights on and off as many times as you like, but you can enter the room only once. Also, you do not know which switch belongs to which light bulb.
Entering the room, you can do whatever you want with the light bulbs, but you can’t go back to the switches. Now the question itself. You need to tell which switch to refer to any of the bulbs. For example, the second switch works with 3 bulbs and so on.
Solution
In fact, everything is very simple here. If we don't have any additional features, then we can proceed as follows. We turn on one of the bulbs and leave it to burn constantly. We do not touch the second switch at all, but we turn on the third switch, wait a few minutes and then turn it off again. Now when we enter the room we will find one glowing light bulb, one bulb that went out and was cold to the touch, and one that was also extinguished but felt warm/hot to the touch. Based on this, we will be able to understand which switch belongs to a particular light bulb.
It is also possible to answer in a different way. For example, if we have the opportunity to use additional things, then we can submit more current to any switch. Now, entering the room, one light bulb will be burned out, one on and one off. Again, it will not be difficult to determine which switch belongs to which light bulb.
In the section on the question Riddle about 3 light bulbs asked by the author Salmon the best answer is Turned it on, waited a bit, turned it off.
Turned on another. I went. One bulb is on, the other (which was on before) is warm.
Answer from 22 answers[guru]
Hello! Here is a selection of topics with answers to your question: Riddle about 3 light bulbs
Answer from I-beam[guru]
call an assistant), since he himself can’t do anything ....
Answer from Obichniy Pacan[guru]
Break the wall into the basement with your head, so you can see!!
Answer from worldview[newbie]
turn on the flashlight
Answer from P I[guru]
We turn on one switch, wait for a while (say, 5 minutes), turn it off and turn on the other, after which we go to the light bulbs. We left one switch on - the corresponding light is on, of the remaining ones, the one that was on recently will be noticeably hotter than the one that has been turned off all this time. The one that is hot corresponds to the switch that we turned on and then turned off, the remaining one corresponds to the switch that we did not touch at all.
everything ingenious is simple.
Answer from Vadim[guru]
open the switch connect the diode. turn on one. leave one off. through the diode to the floor of the glow will burn
not the fact that they will reach the lamps
Answer from Kusya[guru]
Turn on toggle switch 1 for a while. Turn it off. Turn on the toggle switch number two and go to the basement. A burning light bulb is connected to toggle switch 2, this is obvious, we did not turn it off. You touch the two remaining lamps with your hand. A warm bulb (just on) is number 1. A cold bulb is number 3.
Answer from Єanis Khairullin[guru]
Turn on 1 switch, turn on the second for 5 minutes, then turn it off, leave the third one alone. Going into the basement, touch the light bulbs. the one that is hot, but does not burn - the second number, 1 number is on, the third one, respectively - no))) right? We were taught logic and ingenuity, sometimes it helps)
