LED Resistor Chart

maybe this will be moved to the top and made important cuz it seems to be an issue for everyone... heres a resistor chart from the back of my pack of 10-ohm, 1/4 watt, 5% tolerance resistors from radioshack



First and Second Color Band
0. Black
1. Brown
2. Red
3. Orange
4. Yellow
5. Green
6. Blue
7. Violet
8. Gray
9. White

Third Color Band (black slash is "divide by'')
Black X1
Brown X10
Red X100
Orange X1K
Yellow X10K
Green X100K
Blue X1 meg
Silver /100
Gold /10

Fourth Color Band: Tolerance
Gold 5%
Silver 10%
none 20%

also a picture of a color chart off the internet...

This should be useful to those who are arranging an LED board for certain lighting applications

 

[BrooklynBay]

Thanks for posting this! Maybe they could make this a sticky?

 

[bigapple]

yea i was hoping so... it would def be useful

 

[Turdle]

Now a little "jingle" so you can remember them--using the first letter of the color

Bad
Boys
Rape
Our
Young
Girls
But
Violet
Gives
Willingly

 

[bigapple]

Now a little "jingle" so you can remember them--using the first letter of the color

Bad
Boys
Rape
Our
Young
Girls
But
Violet
Gives
Willingly

thats the most intelligent thing ive heard all day hahaha... nice work

 

[Sandy]

Now the questions that aren't there:

1) "What resistance should be applied to an LED to have it burn at a given light output and how do you determine this ?




2) How can you determine the amount to change, the rating of the resistor, to alter the light output to brighter or dimmer is you want to ?

I too use the Bad Boy Saying, a lot easier to remember...

 

[BrooklynBay]

http://en.wikipedia.org/wiki/LED_circuit

http://www.wattflyer.com/forums/showthread.php?t=12521

 

[oplitic]

A few sites to help out if you aren't too good at math or whatnot...

This one is a program, does all kinds of calulations. As far as I know the only reason there is a $5 version is because it looks better, not sure though..

http://www.soft32.com/download_212111.html

-----

This one is online and only does the three bands and the tolerance, there's many other's out there too...

http://www.dannyg.com/examples/res2/resistor.htm

-----

And to go with the LED subject...

LED series/parallel array wizard
http://led.linear1.org/led.wiz

-----

and another way of remembering the saying (I personally use the other one but, cause I know how some people can be offended real easily) is:

Bad
Beer
Rots
Our
Young
Guts
But
Vodka
Goes
Well

 

[BrooklynBay]

Here is another website with a calculator: http://ledcalc.com/

 

[Toast]

Heres another Chart i got a few days ago

 

[Sandy]

Didn't notice the dupe...

 

[oplitic]

To remember the value I use:

Cover you ears if you are a young one.

Bad Boys Rape Our Young Girls But Violets Give Willingly.

Look about 7 posts up, JT's post : lol

 

[Turdle]

Look about 7 posts up, JT's post : lol

See, I am always about 1 year ahead of my time--

 

[oplitic]

See, I am always about 1 year ahead of my time--

Do I really need to throw an age joke in here? Nah, I think I'll be nice :

 

[Sandy]

See, I am always about 1 year ahead of my time--

Yup you beat me to it... the story of my life.

Age joke are always appropriate.

 

[BrooklynBay]

Here's another program for calculating resistor values: http://myadcopy.com/downloads/Resistor Color Coder.exe

 

[RickMar]

GRAPHICAL RESISTANCE CALCULATOR in JAVASCRIPT

Point and click Resistor Decoder

Cut and paste the below links then make a desktop shortcut to the site.

http://www.physics.udel.edu/~watson/phys345/decoder/

http://www.physics.udel.edu/~watson/phys345/lab/color-code.html

Rick

 

[RickMar]

Actually http://www.physics.udel.edu/~watson/phys345/decoder/ Resistor Decoder is all you need to make a dedsktop shortcut to. The other is on the webpage.Resistor Color Code Table at the bottom.
Rick