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Author Topic: Another [Edit] LED question. {happy?}  (Read 1652 times)

Ronin

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Another [Edit] LED question. {happy?}
« on: January 10, 2005, 03:55:15 AM »

I had a quick seach but anyway, here is my question...

We over here in the uk have a shop called
"PoundLand" (Everything is a pound)


And they were selling these multi-led pens that change colors.

THe battries are 3 x lr44's (Watch Type) powering out at 4.5V

So I need to know what type of resisitor I need, Me clicks here

But what does it all mean?
The only bit I know is Supply Voltage, but do I put 5v (comming off the USB header.) or 4.5v for what the leds are use to??


Help would be grand, Cheers.
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MY MEGAHURTZ HAEV BEEN STOELED!!!!!111

john_is_war

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Another [Edit] LED question. {happy?}
« Reply #1 on: January 10, 2005, 10:38:27 AM »

What do you plan on powering the LEDs with?
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Ronin

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Another [Edit] LED question. {happy?}
« Reply #2 on: January 10, 2005, 10:54:55 AM »

Internal USB headers.
I have quite a few spare :D
[Edit main thread]


[Edit]

Well I found a REALY old mobo that had usb headers and I braved it, pluged it in there, switched it on and it allworks ok, so I think DO I REALY NEED ONE?

Ok yes I have heard threads saying YES. So shall I just put a 100ohm on the end of it?


I ment beginning of it.
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Chris

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Another [Edit] LED question. {happy?}
« Reply #3 on: January 10, 2005, 11:50:46 AM »

I would put one on just to be safe.
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Ronin

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Another [Edit] LED question. {happy?}
« Reply #4 on: January 10, 2005, 11:52:44 AM »

100ohm yea?
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viridius

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Another [Edit] LED question. {happy?}
« Reply #5 on: January 10, 2005, 04:56:37 PM »

That sounds like an acceptable value.
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Ronin

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Another [Edit] LED question. {happy?}
« Reply #6 on: January 17, 2005, 10:58:25 AM »

Then why is the resistor getting a lill hot?

OH LOL Just to show what a n00b I an, I put it in the 12v RAIL LOL

[Not going thu usb anymore]

HAHAAHA


n00b.....
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