# Do I Need a Series Resistor in Front of a Blinking LED?

I bought LEDs with a built-in chip which make them blink. The type of the LEDs are Kingbright L-56BSRD-B. The complete spec sheet is here.

After reading the spec sheet I do not know if this LED needs a series resistor.

The spec states:

• Operation voltage from 3.5V to 14V.

But then it has a row with the forward current:

IF Forward Current, Min:8mA, Typ:22mA, Min:VF=3.5V, Typ:VF=5V


Do I need a series resistor for this LED if I stay in the specified operating voltage range?

• Didn't know this was a thing, thanks for enlightening me, so to speak! – Dan Aug 18 '15 at 18:15