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FAQ

How much is the working voltage of LED lamp flashlight
Different LED parameters are not the same, just know to look at the specifications or test, the most commonly used are 3-3.5V 20MA 0.06W 7LM 3-3.5V 60MA light, 0.2W light is about 20ML, 3-3.5V 350MA 1W is a light around 100LM.
Which brand is LED flashlight good? Recommend it
Look at the brightness, good LED flashlight, high brightness, slow attenuation.5, look at waterproof, good LED flashlight with waterproof, earthquake resistant, that is, resistance to fall.
How to detect the flashlight LED lamp is good or bad?
Very sure. Both the 200 and diode files can be measured directly, and LED has been doing so. But if you connect together the series resistance measurement, the superfluous. LED is different from ordinary diodes, but not everyone knows nothing about it.This is your hat bright LED, current parameters 20mA, mA of the few chips to judge the quality of light is LED.
How to make the simplest 1.5 volt LED energy-saving lamp, flashlight?
The comrade upstairs was not quite right. Positive guide of white LED through voltage does more than 1 batteries, but the market does have a battery power supply using the LED flashlight, before the "radio" magazine also introduced, you can use a simple self-excited shunt switch power boost, and then drive LED. At that time the magazine for circuit drawings, switch 13001 as a side switch with a small power, coupled with the control base current on a secondary resistor, with a 1N4148 high frequency rectifier, transformer with high frequency magnetic ballast inside the winding. This circuit is very simple, I have not tried. But I used the voltage circuit structure of 6V is similar to the EI power transformer lighting fluorescent lamp, the boost circuit is feasible. The original circuit I can not find, the following illustration of the picture for reference only, the first side of the same structure, the two side does not need to double voltage rectifier circuit, the direct 4148 half wave rectifier is ok. Similar circuit in Baidu pictures search there are many, there is no transformer structure, the use of inductance step-up.
How many lumens is the 35W LED flashlight?
LED can now do about 90 lumens, 35 watts per watt, or 3150 lumens
Would you please use the LED of a flashlight with size 5 batteries to make it glow with a No. 3 or 7 ordinary battery?
There will be no change in brightness, but the duration will change, for example, when the number of batteries in 3 is the maximum, it will take longer
What brand of LED high power flashlight is good?
This simple electrical quality basically is a few be roughly the same, LED lighting block can punch a switch and a battery charging module, the quality is no what difference, price is too high, not too, not to mention the brand, in fact, are similar
What kind of batteries do LED flashlights usually use?
Lithium batteries have 186502665014500 of these models, as well as batteries with protective panels and without protection panels. These are some of the wolf flashlight, and can use lithium batteries and batteries can be used. We should be familiar with dry batteries, because they are used in daily life, such as battery five, battery seven, and that kind of battery.