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A: The voltage for LEDS varies from 1.8v to even 5 volts. These voltages also varies from color to color. A 5 volt LED usually has a tiny resistor in series so the led can be tied across a 5v buss as a unit. Some manufactures actually has two LEDS in series to provide more brightness
Wiki User
∙ 13y ago
Wiki User
∙ 11y ago2 to 4 volts ,depends of colors
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The voltage drop across led is?
The voltage drop across an LED varies, but is typically around 2 volts.
Will a LED shine brighter if it is connected to a higher voltage?
A LED has a forward voltage drop dependent on it's composition. It is fairly constant within a small range of current flow. If the voltage is too high and the current is not limited, the LED will burn out. The brightness can be varied by varying the available current, but the voltage across the LED remains virtually the same.
What is the voltage requirement for 1 yellow LED?
A: Usually LEDS are 1.8v but this varies from color to color and size. When a LED is bought that is when the voltage is current must be evident otherwise you need a VOM and a 9v battery and some resistors to find the voltage.
What semiconductor diode glows when voltage is applied?
Light Emitting Diode or LED
How much voltage the infrared LED need to function?
Just under 2 volts
What is LED Forward Voltage?
The forward voltage of an LED is the voltage that must be applied across the leads of an LED, anode to cathode, in order for the LED to function and turn on.
Why does a Led have a 470 resistor connected to the LED?
A: That resistor is there to limit the current to the LED it can be any value if the voltage is decreased or increased or no resistor if the voltage across the led is equal to the forward voltage drop.
Give the operating voltage of LED?
A; a LED can have a voltage of 1.8v to 5 or higher voltage whites and red are usually in the low voltage while green and blue are int he range of higher voltage
What is the value of the voltage the led light needs?
There's no set voltage that'll run ALL led's, it'd depend on the particular led.
The voltage drop across led is?
The voltage drop across an LED varies, but is typically around 2 volts.
What happens to an LED When the voltage is to high?
when a LED is subjected to a high voltage it will heat up and burn the internal junction, which will leave the LED open circuit.
Why must an LED always have a resistor connected in series with it?
An LED usually has a resistor connected in series with it because an LED (light emitting diode) is not linear in current to voltage (like a resistor) and has to be operated within specified current and voltage conditions. In most circuits the supply voltage is higher than the forward voltage of the LED so the LED would burn up from too much current without a current limiting resistor in series. The resistor sets the voltage and current to a good operating point (voltage and current) for the LED by dropping some voltage across it. The operating point varies depending on the size, type and manufacturer of an LED so the LED's data is used to select the right resistor size for a given voltage source.
Will a LED shine brighter if it is connected to a higher voltage?
A LED has a forward voltage drop dependent on it's composition. It is fairly constant within a small range of current flow. If the voltage is too high and the current is not limited, the LED will burn out. The brightness can be varied by varying the available current, but the voltage across the LED remains virtually the same.
How voltage passes to led?
LED needs a voltage drop, like Vled=0.7V (see datasheet of the component) in order to start conducting. A voltage below 0.7V the led dont conduct therefore it wont emit any light.
What is the voltage of an LED monitor?
Three volts...
How much resistor should use for 20000mcd led?
Has nothing to do with the intensity of the LED, and all to do with the voltage/amperage of thediode, and the voltage of the system it is supposed to be used with.
What is the voltage requirement for 1 yellow LED?
A: Usually LEDS are 1.8v but this varies from color to color and size. When a LED is bought that is when the voltage is current must be evident otherwise you need a VOM and a 9v battery and some resistors to find the voltage.
