LED without a resistor

Hi guys,

Sorry for this question but i'm new for arduino and i don't have many knowledge in physics and electrical circuits, soldering, wiring,...etc.

I would like to know if there's a LED that can be used without a resistor.

Like some sensors or modules have a voltage regulator that allows them to be powered on either 3.3v or 5v, I am wondering if there's a LED or any lamp/light module(not AC light) that has a voltage regulator so that I can use it without a resistor.

Thank you

Some LEDs are made with an integrated resistor. They are more expensive and not very common.

Personally, I solder a resistor to a regular LED. Then solder to either a 2-pin male or 2-pin female.

High powered LEDs might come with an integrated controller. e.g. to maintain light output as a battery drains.

I suspect that your interest is in cheap small stupid LEDs. That require a cheap small resistor to limit the current.



Try this.

Oooh, nice assembly work LarryD. Got to remember that for next time.


Diodes give a small voltage drop, I think I remember it's on average about 0.6 V,

To be honest I'm a beginner so I don't know how I would do it without external components.