The LED will use all the current it can, that’s why LEDs need a current-limiting resistor. This design has a 470ohm resistor. If I make a very wild guess (knowing it’s a green LED) that the voltage drop through the LED will be about 2.4V, and we know I (current) = V (voltage) / R (resistance), we get I = (5.0V-2.4V)/470ohm = ~5.5mA, which isn’t far off the given current spec. Generally, the max current spec of an LED is an absolute limit. You can run it anywhere below that :)
↧