Factory direct wholesale new product portable usb led light rich colors usb led lights

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Brand Name:	Lianfali	Model Number:	usb Light	Place of Origin:	Guangdong China (Mainland)
Use:	Computer	USB Type:	Other	ODM/OEM:	support

Packaging Detail:	Carton
Delivery Detail:	3-15days

Features:

1.By using low rated voltage 5v,power 1.2,safety and high efficiency.

2. Connectable to USB ports on any iBook, PowerBook, Cube or PC notebook.

3. Plug and play

4. Powered by USB port, no external power needed

5.Usb led light for night work

Factory direct wholesale new product portable usb led light rich colors usb led lights

Q:The top LED lights always burn the bulb in series: If the regulator is powered, it is necessary to lower the voltage

Q:Hanging on the tree string lights, each one is 10 meters long, with a controller, I asked the factory with the AB protection, but the manufacturers say that only do the general anti rain, no water, even the rain stop, I want to use plastic wrap, don't know? Which expert can give advice and advice? emergency: You can use the plastic wrap, mouth down, so even if again under the rain is not bad. Or glue the entire controller to the point where the water is likely to enter the water.

Q:220vled water lamp string how to connect, that is, 220 of the electricity: The triode acts as a switch in the circuit, and when the circuit is through, the left LED is first lit. The base is connected with a capacitor to connect the collector of the next triode.

Q:LED lights string broken, how to repair?: LED lights string broken: you can check one by one, which is bad, which change.

Q: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 connection

Q:The number of lights in the LED string: 15 lights, 30 lights, and 60 lights refer to the LED band. How many LED components are welded per meter length?

Q:How much is the voltage across the 20 LED lamps in series?: LED lighting general LED lamp belt voltage, conventional specifications are 12 volts and 24 volts, if it is 12 volts, that voltage is 420 volts, if it is 24 volts, that is 840 Volts

Q:Why are there three lines for the controller of the LED light string? What are they?: The LED pipe positive string is connected with 4-5 1K2W resistance strings, and the other end of the resistor is connected with the common positive pole of the controller. LED tube controller's direct bright output (Huang Xian), if the LED tube brightness is not too bright, minus a resistor. Remember not to short-circuit, short-circuit, burn out the controller. The less string LED, the more resistance string.

Q:Section LED lantern, no controller, can shine principleTwo now reduced brightness string string: Led 2 polar tube inside chip oscillator circuit, and the general appearance led 2 polar tube without distinction, only connected to the power supply of two kinds of color turns light, 1 seconds, I bought the 5MM red, blue autoflash. From the appearance of the series, but not necessarily in series

Q:Example: if I want to do a 40 head low voltage lamp string, do 10 lights, 1 loop, transformer is 150MA, then how can I calculate the resistance? The grid is 60 Hz of China's power grid! Give a formula, and then count the examples. What is it?! Thank you: Diode products cannot be calculated by resistors.

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