Why is the bulb of the LED flashlight only two bright?
In fact, the current flashlight LED has been very cheap, at most 1 yuan or so, the resistance is only a few cents
LED is a light emitting diode as the working voltage of general flashlight LED is about 2~3V, the working current of about 20mA, the maximum voltage flashlight can provide only about 12V, so LED is two a series with a current limiting resistor. Only two of them are still bright. It is possible that the rest of the LED is broken down or the resistance is aging. The resistance increases and the rest of the LED is not bright.
LED is a light emitting diode as the working voltage of general flashlight LED is about 2~3V, the working current of about 20mA, the maximum voltage flashlight can provide only about 12V, so LED is two a series with a current limiting resistor. Only two of them are still bright. It is possible that the rest of the LED is broken down or the resistance is aging. The resistance increases and the rest of the LED is not bright.
