Main > Main Forum

LED questions

<< < (3/3)

ivwshane:

--- Quote from: Franco B on November 07, 2008, 02:34:06 am ---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).


--- End quote ---

Thanks.

Since these are second hand led's am I screwed if I don't know the values (other than the source voltage)?

Navigation

[0] Message Index

[*] Previous page

Go to full version