What is the principle of a light bulb that can light up without electricity?

Sometimes you don't touch it with your hands, it will glow dim, that's because the lamp is not standardized when installed, put the switch on the side of the neutral line, the live wire passes through the lamp and then passes through the atmosphere or your hand and the ground to form a loop, there is a weak current, the lamp will fluoresce.

Advantages of energy-saving lamps:

1. LED energy-saving lamps are highly efficient and energy-saving: lighting in modern society is an indispensable tool in people's lives, so energy consumption is also very.

Large, heavy use of LED lights, will save a lot of energy. Comparison of several lamps that consume the same 1 kilowatt-hour of electricity while emitting the same brightness.

A. The LED light only needs 3W and can be used for 333 hours.

b. Ordinary incandescent lamps need 60W to work, but they can only be used for 17 hours.

c. Ordinary energy-saving lamps need 10W to achieve the same brightness, and 1 kWh of electricity can be used for 100 hours.

As can be seen from this, LED lamps can save at least 3 times more energy than ordinary energy-saving lamps.

2. LED energy-saving lamps have a long service life: LED lamps emit light through semiconductor chips, without glass bubbles, not afraid of vibration, and not easy to break.

The service life can reach 50,000 hours. Compared with the production of ordinary light bulbs (1000 hours of use), it is 50 times longer than its use time; With the general energy energy-saving lamp (make.

8,000 hours) is more than 6 times longer. It's the obvious super boss.

3. LED energy-saving lamps are green and environmentally friendly, and they are healthy to use: LED lamps do not contain harmful elements such as mercury and xenon, and will not produce electromagnetic radiation and harmful emissions.

Line. a. Ordinary lamps contain elements such as mercury and lead, and harmful radiation such as external and infrared rays are generated when the power supply passes;

b. The electronic ballasts in energy-saving lamps will produce electromagnetic interference, which is also not conducive to health.

4. High light conversion rate: 90% of the electrical energy of LED lamps is converted into light energy, while only 20% of ordinary bulbs are converted into light energy.

5. LED energy-saving lamps are safe and more widely used. LED lamps require less voltage, less current, and less heat, and can be directly used for sunlight supply.

Electricity, field lighting and other remote places, no geographical restrictions.

6. Protect eyesight, no jitter of the light source.

LED energy-saving lamps have been applied very early, such as the indicator lights on the computer and the indicator lights on the TV, all of which belong to the LED lights, but they should be.

It is still a matter of the last few years to use it for lighting. With the development of science and technology, the cost of making LED lights has been greatly reduced, when it is low enough to accept the capacity.

, began to be applied on a large scale, so there are many advantages of LED energy-saving lamps, but there is only one disadvantage, that is, the cost is relatively high, but with.

With the advancement of science and technology and a large number of applications, cost is not a problem. Flashlights, electric lights, and car lights are also being used in large quantities.

LED lights up. Ningbo decoration network to give you an analysis of the advantages and disadvantages of LED, I hope you have something to gain after reading.

The working principle of LED energy-saving lamps is: using high-brightness white light-emitting diodes as the light source, the cold light source used, does not produce heat, and is more economical.

Electricity. The light source can realize seven color changes of LED through the built-in controller of the microcomputer, and the light color is soft, bright and colorful.

Whether it is the filament in the bulb that burns out, replace it with a good one, if it still does not light up, it means that the live wire is broken, and there is no electricity passing through the bulb by measuring it with an electric pen, the zero line is broken, it cannot form a loop, and the light will not be on.

2.The live and neutral wires are short-circuited and no current passes through the bulb.

3.The rated power and rated voltage of the bulb are too high, and the power supply voltage used does not reach this value, and the light does not turn on.

4.Of course, it was because of the power outage, so the lights were not on.

Why is there no electricity when the line is powered on, this is because the line is faulty, and there is electricity before the light is turned on is some electrical components circuit electricity or induction electricity, so when the light circuit induction electricity is returned to the zero line of the power supply through the bulb, in this case, there must be a professional electrician license or a person called the operation certificate to check the cause in detail, eliminate the fault, and use it normally.

What is the matter with the lights having electrical outlets and running out of power.

1. If the circuit of the socket is faulty, it is recommended to see if the switch of the control socket is tripped, if so, replace it with a new line. 2. When the socket is aging, there will be no power in the socket but there is power in the lamp, and in this case, you only need to replace the new socket.

What are the precautions for installing electric lights?

1. For the use of this kind of product, it must operate under the predetermined voltage, so the grounded lamps must check the condition of the line and grounding to avoid the danger of electric shock due to leakage. In addition, in some heating equipment or steam places, ordinary lamps and lanterns cannot be used, otherwise it is easy to damage the lamps due to high temperatures.

2. Not only when changing or disassembling the cover and fuse, we should pay attention to cutting off the power supply first to increase the safety of construction, and also pay attention to scrubbing the lamps with warm water, not using gasoline and volatile gasoline to scrub. In addition, when installing, it is also necessary to pay attention to planning the installation location and type of lamps and lanterns, so as to keep the power cord. 3. For the installation of lamps, we should also pay attention to the height, for example, the height of the living room must be higher than 2 meters, and the lamps and lanterns should not be connected randomly when wiring, the ground wire of the lamps and lanterns should be on the bottom line, and the zero line should be on the zero line, do not connect the wrong line, otherwise it will affect the use.

In an electrical circuit, there is no switching bulb to emit light.

In an electrical circuit, a switch only plays the role of turning the circuit on and off. If you don't use a switch, the bulb is directly connected to the circuit, as long as the circuit is active and closed, the bulb can emit light, which is equivalent to the switch in a closed state, but this connection method is equivalent to live operation, and this wiring is generally not allowed. As you can see in the diagram below, the switch is equivalent to a length of wire.

The switch is in the open state during normal wiring, see the figure below

In the circuit, the bulb will also light up if there is no switch, and it will light up when the bulb is powered on directly, while the switch is just a device that turns off and disconnects the circuit, and it is a controller.

After powering on, I found that the light bulb still didn't light up, what was the main reason? If the switch is not in good contact, if you find that the living room light is faulty or flickering, the most important thing is that when you install the light fixture at home, there may not be any clear line, so the line is connected wrong, and the live line and neutral line on the lamp do not know whether it is properly connected to the power supply, so the power supply is not unlocked at all. In fact, the light is already off, so when you turn on the switch, the light naturally doesn't come on.

If the mains voltage is detected on the lamp. Check the bulb 3. Check whether the contact between the bulb and the lamp holder (lamp bracket) is good, and check the wiring of the lamp holder (lamp bracket).

If the bulb control switch is connected to a power supply location that is not installed correctly, the uncontrolled bulb will also be short-circuited. In a circuit, if the current does not flow through the power-consuming element, but is directly connected to the two power supply poles, the power supply is short-circuited. According to ohm i=u r, the circuit lamp fails when the power supply is short-circuited due to the very small resistance of the wire.

If the light on the lamp's cap circuit is not on, check the lamp first. Installed in the house is a light bulb. This can have many types of polylines.

Let's check it out thoroughly. Electrified wires are in poor contact, disconnected AC, low voltage. Check the incoming wire for loose wire ends, especially if there is a problem with the live cable of the electrical terminal of the light wire in the bubble switch from the switch to the lamp bracket (base).

Bulb failure causes: bulb failure, bulb failure and maintenance methods do not exceed the above.

If you use a measuring pen to measure whether the neutral line and live line are energized, it may be due to the following reasons: self-faulty circuit. The neutral wire in the lighting circuit burned out, and the internal filament burned out.

Repairs are annoying. The most common cause is broken filament. Transparent bulbs can be seen, otherwise they can be controlled with an electric pen.

Turn off both ends of the switch point without lighting and the live cable is disconnected. Once on and off, the filament is disconnected and both ends are lit. Ways to disconnect the zero line:

Replace the lights. Fault symptom: The bulb does not light up.

The human body**, hair, clothes and shoes worn, etc., are prone to static electricity, and constant (friction) between themselves or external objects will produce human body static electricity.

If the amount of charge generated is large, especially in winter, when the air humidity is low and it is not easy to discharge, it can even generate a high voltage.

For example, in winter, people wearing insulating slippers and walking on a blended carpet can generate a maximum electrostatic voltage of 35,000 volts; Jumping up from a leather seat or car seat can also generate up to 6,000 volts.

Thousands, tens of thousands of volts, this is very high voltage, we all know that high-voltage electricity is very powerful, contact with the transmission line of high-voltage electricity caused by electric shock, can not only cause serious burns, but also easy to kill.

The biological effect of electricity on the human body is mainly determined by the energy transmitted by the electric current, as well as the site of action.

The total energy of the electrostatic charge carried by the human body is very limited.

According to scientists' calculations, the human body can be simulated as a capacitor with a maximum capacity of 100 picofarads (1 picofarad is equal to one trillionth of a farad), and the maximum electrostatic potential that can be loaded is 35,000 volts, but the maximum energy that can be released is only 60 millijoules, and the usual load is only between a few millijoules and tens of millijoules.

It should belong to the touch light.

The touch lamp is a kind of lamp, and the switch on and off and brightness of the console lamp can be controlled by touching the metal part of the lamp, which has a long service life and is very energy-saving.

Touch lamps can be turned on and off and brightly controlled by touching the metal part of the lamp. At the same time, the control function can also be realized by keying. The design mainly uses analog circuits, digital circuits, and related knowledge of power electronics.

At the same time, in the process of manufacturing circuit boards, the relevant knowledge and software of PCB design are also used.

This kind of bulb does not use electricity, this kind of lamp has a built-in battery, and the discharge principle is to turn on L n to form a discharge circuit through a short circuit.

That's because this LED light is with a charging device and can be illuminated offline;

Pro, the reasons why the circuit has a light bulb is not lit are as follows: 1. The first thing to say is that when you are in your home and touch the noisy fixture, there may be no clear line in it, so that the line connection is wrong, and the live wire and the zero line on the lamp are not correctly connected to the power supply, so the power supply is not dredged at all, then the lamp is actually equal to no power, so after you turn on the switch, the light will naturally not light up. 2. If the power supply position connected to the lamp is not installed, it will also cause the lamp to be uncontrolled, and the lamp will not be controlled under the premise that your switch does not have a reasonable lap of the live wire and the neutral wire, so in this case, the lamp is not lit is a more reasonable explanation.

3. After the lamps in your home are used for too long, it may be that its service life is up, including the lamp beads in the lamp are broken, the filament is broken, the driver is broken, the accessories are broken, etc., as long as it is a quality problem or a fault problem, it will form a phenomenon that the lamp is not lit in the case of electricity.

A light bulb that does not use electricity can light up by pressing it with your hand, and it is a touch light, and it uses an energy-saving light bulb made of LEDs.

LEDs emit visible light when electrons recombine with holes, so they can be used to make light-emitting diodes. It can be used as an indicator light in circuits and instruments, or as a text or digital display.

Features of LED Touch Light:

1. Strong applicability: The adaptability and reliability in various harsh indoor and outdoor environments have been improved.

2. Rich color: It is composed of three primary colors (red, green, and blue) display unit box, so that the electronic screen can display dynamic images with rich colors, high saturation, high resolution, and high frequency of display and virtual display.

3. High brightness: With ultra-high brightness Chunwei LED, it is still clearly visible from a long distance under the strong sunlight of the sun.

Lamps are incandescent bulbs, arc lamps, fluorescent lamps. Incandescent lamps are made by using the principle that high-temperature objects can emit light, and the tungsten filament will glow when heated to a high temperature of thousands of degrees. The arc lamp is the principle of making and carrying the electric arc to emit light, and it is to make the ionized high-temperature rubber shed closed ion luminescence.

Fluorescent lamps are made using the principle that phosphors can emit visible light when exposed to rays. Since it does not require high temperatures, it has a relatively high efficiency and is a promising light source.

Electric lamp is the conversion of electrical energy into light energy, to provide lighting equipment, appeared in the second industrial revolution, its working principle is: the current through the filament (tungsten beam cracked filament, melting point of more than 3000) when the heat is generated, the spiral filament continues to gather heat, so that the temperature of the filament reaches more than 2000, the filament in the incandescent state, like the red-hot iron can shine and emit light. The higher the temperature of the filament, the brighter the light emitted.

Therefore, it is called incandescent lamp, from the perspective of energy conversion, when the lamp emits light, a large amount of electrical energy will be converted into heat energy, and only a very small part can be converted into useful light energy. The light emitted by electric lamps is panchromatic light, but the proportion of each color is determined by the luminescent substance (tungsten) and temperature. The imbalance in proportions leads to a color cast in the light, so the color of the object is not realistic under incandescent light.