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:
- With built-in blinking IC.
- 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?
Answer
No you don't need a series resistor. On page 3 you see that the current is only rising a little bit depending on the voltage. On normal leds the current almost doesn't depend on the voltage
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