ive searched. didnt see anything useful.

i bought 8 leds all togther from 123leds.com

i bought these in red and blue.

4 red
4 blue

then i bought these in 82 ohm. (i bought 8 of them)

do i need to use all 8? or can i use one resister on 2 leds? or one resister on all 8? what is my limit? is 82 the right ohm to use with those leds? a little late if the answer is no.

now my question.
do i put the resister on the long side or the shorter side of the led?

does anyone have a sinple diagram?
thanks in advance.

Not sure what the 82ohm resistors are for...you'll either need one 22ohm resistor and one 39ohm resistor (running blues in parallel w/22ohm, reds in parallel w/39ohm) or four 100ohm resistors and four 150ohm resistors (running everything in parallel; 100ohm on each blue, 150ohm on each red).

It doesn't matter which leg the resistor goes on. I do all mine on the positive leg (longer one, for consistancy, I guess), but it's the same either way.

i got 82 ohm resisters. i got 8 because i was plannong on putting 1 resister one one led.

8 leds, 8 resisters.

hope that helps why i bought those resisters.

if those r the wrong resister what will happen?

if in series the leds need to be on the positve . if u do it in parallel u got to have one resistor at the top and the rest of the leds in parallel


go to sickmods site he shows diagrams on how to wire in serirs or parallel

ok cool. ill give it a shot. i have 82ohm resisters tho and sickmods.com says to use 150 on red, and 100 on anything else.

btw, i will be doing this around my jewel.

8 total leds.

RR BB


RR BB

r=red
b=blue

maye by that u can help better..lol.

Since the leds take different voltages, if you put the same resistor on all of them then only the red leds will light because that is the path of least resistance. You have to balance them all so they all get the same current by using different resistors for the red and blue.

If you're separating the two sides to red and blue, it would be easy to just wire the reds in parallel and the blues in parallel and just use two resistors.

ok so if i put the 82 on the reds hook them all up to the resister then wire them to the 5v.

then the same with the blue...

meaning 2 seperate curciets. one for red...noe for blue...will this work?

this shit is so confused...

I don't think the 82ohm resistors are going to work...the leds will either not light because they're not getting enough power, or will blow because they are getting too much, depending on how you wire it. I would just go get some new resistors.

ok..can u tell me how many i need and what size then?

im sure i can figure out how to wire them if i know it works right.

thanks for your help btw.

Depends if you want to do two circuits or one. If you want to just do one big parallel, get the four 100ohm and four 150ohm and attach a 100 to each blue, 150 to each red and wire together all positive legs -->5V source, all negative legs -->ground

great thank you very much.

would it be able to do one resister to four red...and one resister to four blue?

if so..what size ohm?

22ohm for the blue, 39 ohm for the red. This would be two separate circuits, though, running in parallel (positive would be: l-l-l-l--res--->5V, negative /-/-/-/-->ground)x2

Someone help me out, feel like I'm missing something here.

With your 82ohm resistor, you will connect one resistor for every 2 LEDs, wired in parallel to 5V.

It can be on the positive or negative side of the LED.

and that will lite both red and blue leds?
i looked at the pictures..which is the parellel?



im gonna take a guess here and say the top one.

Good guess, but you can't lose with that one; they're both parallel

im so confused. i hear done use the 82ohm. then i hear use the 82 ohm. wtf do i use? wtf dont i use?

confusing!

Sorry, I don't understand how the 82 would work with the different colors...you'll have to ask SICKdimension, I think he probably knows more about this stuff than me.

For maximum brightness, you could use 82ohm for the red, and 47ohm for the blue, but since it's such a small difference, 82 will work for both. It is always safe to go over the recommended ohms or wattage, just not under.

In that diagram, the bottom illustration is parallel. You will connect the positive and negative ends of the LEDs together, with a resistor on one of them.

ok so one 82ohm resister for all 8?
or shall i do 1 resister for 1 led like the top diagram?

No, 1 82ohm for every 2 LEDs in parallel to 5V.

ok. well i got the leds today and i hotvlued 2 of them togehter and have the resisters on it.

i got my wire here and just wonderinf how to hook it up. should i put a wire on the resister rides for each leds, and then connect them to 1 single wire to connect to the positive?

or should i have 2 seperate wires going into the positive?

hope this makes sence.

if i'm not mistaken , here is the setup for two led's with a 82 resistor