The LED’s relationship between current and voltage

The LED’s relationship between current and voltage

The simply drive way of led as current limiting by resistor.That said, the input voltage via the resistor connected to LED. LED can made constant light When work voltage remains constant. You can get the strength of light the you want by adjusting the values of resistor
Now,In this example,We’ve got through a standard 5mm LED to expounds mutual coordination between current and voltage. The figure shows function curves between the operation voltage (VF) and Forward current(IF)。We are aware of the concept from picture as follows.this forward voltage change tendency increased with the increase of forward current。Now we will take an example.
the green led work at 10mA. The work current counterpart was the constant voltage 5 volt. . the calculate formula of series resister as (5V -VF,10mA)/10mA = 300 ohm。
led current and voltage
The stand LED of Red light 、green light 、and yellow light has forward voltage range from 1.4V to 2.6V。the forward voltage slightly changes the several hundred when the forward current is low than 10mA.