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The top LED lights always burn the bulb in series
- Do not know what kind of drive you are, try to reduce the current of LED, do not exceed the rated operating current of LED on the line. The method of reducing current is related to drive circuit, and the current limiting method is different for different circuits.s
How do you connect the LED lights?
- Connect the first LED positive pole to the negative electrode of the second LED and then connect the first LED negative pole with the second LED positive pole to the power supplyConnect the positive pole of each LED with the positive pole of the positive electrode, and then connect to the power supply. This is the parallel connections
Low voltage LED lamp string resistance is how to count, there is no formula?
- If you direct the transformer to the LED lamp power supply, the life of the LED lamp will be affected, far less than the nominal value.s
What is the connection distance of the LED light string?Be specific
- The connection distance is 15 meters. If the connection distance is exceeded, the LED light string is easy to heat, and the service life of the LED light string will be affected during uses
How much is the voltage across the 20 LED lamps in series?
- Each LED is about 3V, and the 20 series is 60Vs
How does the LED light string flash?
- Because of the special volt ampere characteristics, LED can not use constant voltage driving mode, but is driven by cross flow. The direct drawback of cross flow drive, however, is heat. So people invented the drive mode of pulse drive. For example, 0.5 seconds per second, so that the amount of heat in the LED is reduced by half. Then turn the frequency up to 100 times per second, lighting for 0.005 seconds each time. At this point, the power of the LED is not the same, and people do not feel blinking. What's more, in this driving mode, an approximate cross flow drive (that is, the current is not necessarily precise) can be simplified, which simplifies the drive circuit (the precise cross flow source is very complex)s
I want to do a string of LED lights that can use batteries. About 55 or so. The lights are 5MM blue. How can I work? Urgent urgent!!
- You can use the 4~6V battery, through the 4W, 2~3 Europe (6V with 3 Euro, 4V with 2 Euro) current limiting resistor, to the LED lamp power supply. The parameters of each lamp are: 3V, 20MA, in parallel (polarity). If you don't quite understand, you can also ask a science and engineering student (preferably a teacher) to help.s
The color temperature of LED light string
- Generally speaking, the color temperature is not an indicator of the LED band, but many foreign customers will make a special request because of the use of the environment.s
Why is police strobe lights important
- Newest police car siren, vehicle siren, electronic siren,used for police car, cop car, fire fighting, ambulance EMS, wrecker, project car, sprinkler, patrol car, emergency vehicle,...
What's led flashing lights
- Led flashing lights are extremely easy to use and install. When activated, this amazing LED light is nearly impossible to miss, which helps first responders increase their visibili...
Specifications and details about flashing led lights
- Fifty yearsago,the huminality had already known the basic knowledge of semiconductor materials can produce light.The first commer cialdiode produced in 1960.LED is short for light ...
How does traffic light sensors work
- How does traffic light sensors work? This must be a question that has been ignored by people who drive to work everyday, because it is too familiar to trigger your curiosity. Nowad...
What's led recessed lighting retrofit
- Led recessed lighting retrofit can be used at Office lighting, home lighting, Commercial shops, hotels, exhibition halls, art gallery, Museum, and so on.Specifications and product ...