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Anonymous users2024-02-06<> "Wait and jujube to eliminate blindness and wait for the bridge to be demolished."
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Anonymous users2024-02-05Light-emitting diodes are used in many places such as night scenes of cities, various traffic lights, automotive lamps, stage backdrops, and stadiums. Below, Tuba Rabbit will be based on the relevant data of Alibaba**, and briefly introduce the specific parameters of different brands of light-emitting diodes and their **.
Light-emitting diodes and their parameters
A land-emitting photodiode, or LED for short, is a semiconductor component that can be used as an indicator, illuminator, or to display text or numbers. It has the advantages of small size and long service life, and is an energy-saving and environmentally friendly green product with a wide range of applications. The parameters of light-emitting diodes mainly include, working current, voltage, power, thermal resistance, dimensions, color rendering index, luminous angle, luminous efficiency, chip brand, color, etc.
Specific parameters of different brands of light-emitting diodes and**
Generally speaking, the use of light-emitting diodes is different. In addition, different brands and models are different, and the ** of light-emitting diodes is not the same, and its parameters are not the same. The details are as follows:
1) Tuozhan expansion 5mm in-line LED with working current: 20 (mA), working voltage: , power:
Dimensions: 5 (mm), color rendering index: 60-70, luminous efficiency:
90 (lm w), color tolerance: 5 (sdcm), chip brand: light macro, color:
White and yellowish hair. Minimum quantity 10000-19999 pcs).
Minimum quantity 20000 pcs).
2) Superior Micro ZYW 5ACC2UW plug-in LEDs.
Working current: 20 (mA), working voltage: , power: , dimensions: 5 (mm), color rendering index: 60-70, luminous efficiency: 120 (lm w), chip brand: San'an, color: white.
3) SY-LP512R light-emitting diode of Shenyi Optoelectronics.
Current: 20 (A), Operating Voltage: , Power: , Color Rendering Index: 80, Size: 5068, Luminous Efficiency: 110 (LM W), Color Tolerance: 5 (SDCM), Chip Brand: Wafer.
Minimum batch size 1-99 k).
Minimum batch size 100-299 k).
Minimum batch size 300 k).
The above are the specific parameters of different brands of light-emitting diodes and how much, I hope to give you some help. If you want to know more, it is recommended that you find more information on the relevant **.
You can get it for free
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Anonymous users2024-02-04Hello, I will answer for you about infrared light-emitting diode parameters, light-emitting diode parameters believe that many friends do not know, now let's take a look! 1. Since the light-emitting diode has the most. <>
1. Since the light-emitting diode has the limitation of maximum forward current IFM and maximum reverse voltage VRM, it should be guaranteed not to exceed this value when used.
2. For safety reasons, the actual current if should be as follows; The super-bright LEDs are available in three colors, but the voltage drop of the three LEDs is different.
3. The pressure drop in red is yellow and green.
4. The rated current is 20mA when normal luminescence.
5. The luminous principle of white light-emitting diode is slightly different from that of other light-emitting diodes.
6. At present, there are two light emitting modes that can make the light-emitting diode emit white light.
7. One is a white light-emitting diode with two-wavelength blue light and yellow light emitting mode, the structure is shown in Figure 1, its basic part is a blue light-emitting diode, which is covered with a layer of fluorescent layer outside the blue light-emitting diode chip, when the blue light-emitting diode chip emits blue light, a part of it is absorbed by the phosphor when it passes through the phosphor, and becomes yellow light, and the yellow light is mixed with the blue light through the phosphor and emits white light.
8. For example, the light emitted by some white light-emitting diodes is pure white, while the light emitted by some is white and blue.
10. Encapsulating red, green and blue three light-emitting diodes in the same tube shell, the light mixing of the three primary colors can also produce white light, but because the cost of making full-color light-emitting diodes is relatively high, full-color light-emitting diodes are generally not used to make lighting, full-color light-emitting diodes are mainly used to manufacture full-color display screens, and making lighting with full-color light-emitting diodes will greatly increase the cost of the product.
11. The forward voltage drop of white light-emitting diodes is different from that of other light-emitting diodes.
12. The forward voltage drop of the white light-emitting diode is about 3 5V, and the forward working current needs to be about 15mA to make it glow normally.
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Anonymous users2024-02-03Summary. The red light-emitting diode has the lowest operating voltage, about; followed by plain green, yellow,; White; Orange; Blue, white, emerald green voltage range:
The red light-emitting diode has the lowest operating voltage, about; followed by plain green, yellow,; White; Orange; Blue, white, emerald green voltage range:
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Anonymous users2024-02-02Summary. Light-emitting diodes are generally used as indicator lights, for example, the computer's hard disk light flashes to indicate that your hard disk is working (if it does not flash, it is likely that your machine is too busy or in standby), and there are some indicator lights on the Walkman, as well as the indicator light of the charger. The forward conduction voltage of light-emitting diodes is larger than that of other diodes, and it is generally in the middle of the day.
two other diodes are generally in germanium tubes), silicon tubes). Rectifier diodes, which are also very common, take advantage of the unidirectional conduction characteristics of the diode, so that the negative polarity electrical signal can be filtered out--- half-wave rectification, and other rectifications can also be carried out--- such as full-wave rectification.
Light-emitting diodes.
Light-emitting diodes are generally used as indicator lights, for example, the computer's hard disk light flashes to indicate that your hard disk is working (if it does not flash, it is likely that your machine is too busy or in standby), and there are some indicator lights on the Walkman, as well as the indicator light of the charger. The forward conduction voltage of light-emitting diodes is larger than that of other diodes, and it is generally in the middle of the day. two other diodes are generally in germanium tubes), silicon tubes).
Rectifier diodes, which are also very common, take advantage of the unidirectional conduction characteristics of the diode, so that the negative polarity electrical signal can be filtered out--- half-wave rectification, and other rectifications can also be carried out--- such as full-wave rectification.
The diode also has a voltage stabilizing effect, because when the diode is turned on in the opposite direction, in the case of the diode being broken down, its current will increase instantaneously, so that when the external voltage increases, the increased current after the diode is broken down will pass through the diode and will not pass through the load connected in parallel with the diode, so that the device connected in parallel with it can be protected. The common one is to protect the FET, that is, to connect a diode in the opposite direction of the gate of the FET. The breakdown voltage of the diode is generally between 4V and 7V
Clamping function: clamping effect is to use the forward conduction voltage of the diode to maintain the germanium tube after conduction), silicon tube), so that the voltage at both ends of the device connected to it is maintained in a range, the simplest is that the BE junction voltage of the triode can be maintained at the clamping voltage when it is turned on, which is often used for the static analysis of the triode. Generally, there is no special description for silicon tubes and germanium tubes.
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Anonymous users2024-02-01Light-emitting diodes are referred to as LEDs and have the following characteristics:
1. Safety voltage.
LED uses a low-voltage power supply, and the power supply voltage is between DC 3-24V, which is a safer power supply than using a high-voltage power supply, especially suitable for public places.
2. Energy-saving model.
The energy consumption is about 80% less than that of incandescent lamps with the same light efficiency, and about 40% less than that of energy-saving lamps.
3. Strong applicability.
It is small in size, can be prepared into a variety of shapes, and is suitable for volatile environments.
4. Fast response time.
Its incandescent lamps have a response time in the millisecond range, and LED lamps have a response time in the nanosecond range.
5. There are many colors.
Light-emitting diodes have red, yellow, green, blue, and orange multi-color light emitting. The working voltage of the red fluorescent tube is small, and the working voltage of the red, orange, yellow, green, and blue LEDs of different colors increases sequentially.
6. **Low.
LED is becoming more and more popular, and due to the power-saving characteristics of LED, the places used will gradually increase.
Extended Materials. Classification of light-emitting diodes.
LEDs can also be divided into ordinary monochrome LEDs, high-brightness LEDs, ultra-high-brightness LEDs, color-changing LEDs, scintillation LEDs, voltage-controlled LEDs, infrared LEDs and negative resistance LEDs.
There are two kinds of LED control modes: constant current and constant voltage, there are a variety of dimming methods, such as analog dimming and PWM dimming, most of the LEDs are controlled by constant current, which can keep the LED current stable, not easy to change VF, and can prolong the service life of LED lamps.
22 in parallel.
It is 420mA, and if you don't do enough power, you have to do about 350mA, and if you add the output of the voltage regulator, it is only 100mA, which means the rated voltage of this LED. >>>More
Crystal diodes are often represented by "d" plus numbers in circuits, such as: d5 represents a diode numbered 5. >>>More
For example, a child is short and wants to go out but can't reach the deadbolt and can't open the door, and an adult is tall enough to reach the deadbolt, and the child can enter and exit after he opens the door. >>>More
The diode is forward conducted, and the current flows from the p-region to the n-region, which is equivalent to the electron flowing from the n-region to the p-region. The energy levels of electrons in the two regions of the pn junction are different, and the energy level in the n region is higher than that in the p region. Therefore, the process of current flowing from the p-region to the n-region when the diode is turned on is the process of continuously flowing electrons from the n-region to the p-region. >>>More
The inventor of the vacuum triode was the American scientist Lee de Forest (1873 - 1961). In 1904, Fleming invented the first electron tube by adding a plate pole in front of the wire (filament) heated in a vacuum He called this kind of electron tube with two poles diode Using the newly invented electron tube, the current can be rectified, so that the ** receiver or other recording device can work Nowadays, when we turn on an ordinary tube radio, we can easily see the tube with the filament burned red It is the heart of the work of electronic equipment and the starting point of the development of the electronics industry.