Main > Main Forum

LED questions

Pages: << < (2/3) > >>

richms:

Much sooner meaning straight away IME ;)

Also, since the blue and green appear brighter then the red, calculate the resistor for the red and use that on the other 2, he blue and green will be a bit dimmer but nothing major.

ivwshane:

Sorry for replying so late. Here is a pic of the LED (sorry for the low quality).




Would I need a resistor for every LED or just for each string? If i do get a resistor how do I wire it to my pc's power supply?

ivwshane:

Can anyone answer the above question (how many resisters do I need)?

What type of resister do I need (yes I'm a noob when it comes to this stuff).

fjl:

Back when I used to work with LED's I believe I used to put 1k Ohm resistors for each LED.

Franco B:

You need to know a few details before you can figure out what resistors to use and how to wire them.


* Source voltage you are using (either 5v or 12v from your PSU)
* LED forward voltage (should be somewhere around 3v)
* LED forward current (should be somewhere around 30mA)
* The amount of LEDs you wish to light
When you know all of them put them into [this] calculator and it will tell you which resistors you will need and how to wire them (series/parallel/combination).


Pages: << < (2/3) > >>

Go to full version