Why do the string lights flicker during the Chinese New Year, and why do the string lights flash and

The reason why the string lights flickering during the New Year is because there is a "jumping bubble" in series in the circuit, which will make the circuit continue to turn on and off, so that the circuit will go off and on for a while.

The structure of the jumping bubble is characterized by two parts of the filament, one side is an inverted L-shaped lead, and the other side is a filament with a bimetal sheet at the head, and the two are usually in contact. After the power is on, because the filament glows, the bimetal sheet is heated and bent, and when it leaves its original position, the circuit will be cut off, and the bimetal sheet will be straightened and connected to the circuit after cooling. This is also the reason why some lanterns can flicker and some don't.

In addition to the filament, each lamp also has a resistor connected in parallel between the two lamp pins, and the resistance of this resistor is much greater than the resistance of the filament. Therefore, when the small lamp emits light, most of the current passes through the filament, and only a small amount of current passes through the resistor, so the small bulb emits light normally. When the "bubble" cuts off the circuit, the current passes through the resistor, and the voltage on the resistor will increase greatly, so that the voltage on the other lamps decreases, so that the other lamps become darker than the original.

LED (Light Emitting Diode) is a solid-state semiconductor device that can directly convert electricity into light. The heart of the LED is a semiconductor wafer that is fixed on a bracket with a negative pole at one end and a positive electrode connected to the power supply at the other end, so that the entire wafer is encapsulated by epoxy resin.

A semiconductor wafer is made up of two parts, one is a p-type semiconductor, in which holes dominate, and the other end is an n-type semiconductor, which is mainly electrons here. But when these two semiconductors are connected, a p-n junction is formed between them.

When an electric current is applied to the wafer through the wire, the electrons will be pushed to the p-region, where the electrons will recombine with the holes, and then the energy will be emitted in the form of photons, which is the principle of LED luminescence. The wavelength of light, which is the color of light, is determined by the material that forms the p-n junction.

LED lamps will have the same strobe phenomenon as ordinary incandescent lamps under the drive of alternating current, the series voltage will be smaller, and the power will be reduced, so the brightness will be reduced.

There is an integrated chip oscillation circuit inside the light-emitting 2-electrode, and there is no difference between the appearance and the general light-emitting 2-transistor, just connect the power supply and the two colors will be lit in turn, 1 second and 1 change, I bought 5mm red, blue self-flashing From the appearance, it is in series, but it is not necessarily in series.

LED String Lights:

Light-emitting diodes are abbreviated as LEDs. It is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc.

When electrons recombine with holes, they emit visible light, which 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. Gallium arsenide diodes glow red, gallium phosphide diodes glow green, silicon carbide diodes glow yellow, and gallium nitride diodes glow blue.

Due to its chemical properties, it is divided into organic light-emitting diode (OLED) and inorganic light-emitting diode (LED).

There is a kind of light-emitting 2-electrode with an integrated chip oscillation circuit inside, the appearance is no different from the general light-emitting 2-transistor, just connect the power supply and the two colors will be lit in turn, 1 second 1 change, I bought 5mm red, blue self-flashing From the appearance, it is in series, but it is not necessarily in series.

Is it tandem??? That dimming must be a voltage drop!

There is definitely a control system, but not a time relay!

It should be a general-purpose microcontroller!

Oh, it's basically impossible to be normal after series connection, unless the voltage is raised!!

First, it is impossible to flash without a controller, unless the grid is polluted.

Second, the current decreases when connected in series.

Sentiments about your profession, friend?

The friends below, a string of colored lights, and a single-chip microcomputer, are too exaggerated.

There is a controller, you can buy a ready-made one, but it is expensive, it should be around 25 yuan.

If the voltage is reduced together, it will definitely be darkened, and if it flashes, it should be a time relay.

Because different colors of light-emitting diodes are used, shunt time-sharing control is implemented.

Because they are painted with Sun Yichun's colored brushes!

How to hang Spring Festival lanterns? When is it hanging? Remember the 4 rules for a good New Year.

There is nothing particular about this, as long as you hang it beautifully, you can hang it. Satisfied, thank you.

If the constant current power supply for power supply is faulty, just replace it with a new power supply.

In the past, a fluorescent lamp lighter was connected to the power cord (quite a switch), and after the power was turned on, the light would flash with the on/off of the lighter because the lighter would continue to turn on and off under the action of current. The current flash string lights are controlled by the control circuit to turn on and off the thyristor, and the high-end ones can also adjust the flash frequency and the interval between light and dark.

Because my mother passed away less than a year ago, I still don't want to hang up the lights. I'll talk about it later.

In the countryside, it is not allowed, you can't hang lights, you can't stick pairs. You can't set off firecrackers either, and you can't wait until three years later.

According to rural customs, there can be no red in the home in the first year, such as sticking couplets to hang lanterns, in the second year, you can paste blue or yellow, and in the third year, it can be the same as in previous years.

According to tradition, my mother died less than a year ago. You can't hang a red light at home. Hanging can only be hung with white lights.

There is no diagram, you use a multimeter to measure the quantity. How many lights are you, what a control method?

I don't know the specific circuit principle of the controller, the two incoming wires are 220V alternating current, the controller will rectify into direct current, and the outgoing wire is four: one is the DC negative pole connected to the common wire, and the other three are DC power supplies, and the lights of the whole string of lights are divided into three ways, and the controller controls the three ways to light up or fully light or gradient and other effects in turn. If the string lights are not lit or abnormal, first check whether the controller part is burned out or whether the wire is broken, the wire is broken and connected, and there is no need to replace the controller if it is broken.