Would this work?... (wiring help)

[Mythtron]

Hi,

Just a quick question (I'd like to confirm with ppl more knowledgeable about the subject than myself)...
Would the following wiring scheme work? I'm trying to light up 2 leds via the 5 volt connection and a 10 ohm resistor. The leds are in series, and negative is connected to wifi switch.

Here's a diagram:


PS: Would series be better or parallel?

[Rory]

Parallel.

Otherwise they would appear dimmer . Well too dim.

[Blazinkaos]

Yes go with the parallel.

[ApheX]

Yes if i was doing this circuit i would wire it in parallel, i have edited your image a bit to show how i would go about doing it:

[img=http://img235.imageshack.us/img235/1874/myvfy0.th.jpg]

the resistor for the Red led should be a 155ohms 1/8 watt resistor. (on the image the yellow things are resistors.)
The resistor for the blue led should be a 90 ohm 1/8 watt resistor

Sorry about the poor quality image, but it just about gets across how i would wire it.

Nice diagram dude, but you don't need two resistors for the led mod. one will be fine as long as you place it on the 5v point.

[Mythtron]

Thanks for all your advice. I know now to definitely go with parallel for the leds.
But the resistors, can't I simply use a single 10ohm resistor, why/why not? (if I must use 90 & 155 ohm resistors, then I was wayyy off )

[Blazinkaos]

Those two resistances are calculated to the exact requirements of the leds in question, and the power source you plan to be using.

Also 10 ohm is too little resistance for 5 v and two leds with differing voltage requirements, the leds would either blow, or would have a shortened life.

good explanation alien..

[Jumbo]

I have a question.. Why the are you using the 5 volt when you can use the 3.6v on the powerboard. You wouldnt need as much resistance and it would be easier to solder.

[Blazinkaos]

Yea there is that option..

[ApheX]

Thanks for the advice

But as i'm sure you know red and blue leds have different voltage requirements.

Surface Mount Red leds have a forward voltage of 1.9v with a max of 2.3v

and

Surface Mount Blue leds have a forward voltage of 3.2 v with a max of 3.8v

So you would need a different value resistor on each branch of the parallel circuit to ensure that you don't blow either of the leds.
Both of those resistance values i calculated are perfect for the voltage requirements of each led.

Hope this helps

Also if i was planning on using one resistor you could place on either side of the circuit before the branches, it doesn't necessarily have to be on the 5v side

Ah, i see. i didn't know red leds were being used. that makes alot more sense. just finished working on a psp with red triggers and jewel. took me awhile to work out why i was blowing the  things, lol!

I have a question.. Why the are you using the 5 volt when you can use the 3.6v on the powerboard. You wouldnt need as much resistance and it would be easier to solder.

Thats true, but i've heard people saying that method drains power from the power/charge led. making them dimmer. the wifi method doesn't have that problem. (apart from the wifi being on all the time which isn't that bad really)

[Jumbo]

im just talking about the + point use the wifi switch if u want but get the + from the p-board lol
 

[Jumbo]

ya but now u need to line up resistors... and its really not to much mroe wireing like 3 inches more of kyanr that like a penny...