So i finally got a sound card and i could use some help with the final touches

[Malfegorus]

Like the title says i already bought my sound card and thats on its way so i have all of this

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MPS Pommel style 4
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Hilt style 4
Machine recessed 16mm AV switch hole
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MHSV1 Blade Holder Style 1
MHS Heat Sink V4 (Flat Style)
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16mm Anti Vandal Short Momentary Yellow Ring Switch
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MWS Recharge Port
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Custom Tri-Cree LED
Amber Cree Die
Red Orange Cree Die
White Cree Die
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Stainless 4-40 all thread
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7.4v Li-ion 2600mAh 18650 Battery Pack
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Premium 28mm Speaker
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NB V2 MWS Header and Wiring Harness
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18deg Tri-Rebel/Cree Star Lens
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Star thermal tape pad


im getting the chassis from a 3rd part on shapeways ill post pics of those too

125421254312544

so i think i have all that sorted my main problem is the resistors. I just cant wrap my head around them.

[Silver Serpent]

I see you have the NB wiring harness and a 7.4v battery pack. What sound card do you have? The Nano Biscotte uses a 3.7v pack, and a 7.4v pack will burn it up.

Here is the tutorial for calculating resistors: http://forums.thecustomsabershop.com/showthread.php?17109-Tutorial-FJK-s-quot-Down-and-Dirty-quot-guide-to-Ohm-s-Law

Or you could go the lazy route and use the calculator in my signature. It tends to round up values more than is necessary, but it gets the job done.

[Malfegorus]

I see you have the NB wiring harness and a 7.4v battery pack. What sound card do you have? The Nano Biscotte uses a 3.7v pack, and a 7.4v pack will burn it up.

Here is the tutorial for calculating resistors: http://forums.thecustomsabershop.com/showthread.php?17109-Tutorial-FJK-s-quot-Down-and-Dirty-quot-guide-to-Ohm-s-Law

Or you could go the lazy route and use the calculator in my signature. It tends to round up values more than is necessary, but it gets the job done.


ok so i did that and for the 2 amber leds i would need a 3.3 ohm 2 w resistor the shope only sells 3.3 ohm and 5 w is this ok? or do i need to look somewhere else for my resistor

[Forgetful Jedi Knight]

You have to do the calculations based upon the 3.7V pack. The 7.4V pack will blow up your sound card.

[Malfegorus]

You have to do the calculations based upon the 3.7V pack. The 7.4V pack will blow up your sound card.

i did change that just not in the post

[Forgetful Jedi Knight]

i did change that just not in the post

Then your calculations are off.

[Malfegorus]

Then your calculations are off.

12548

can you explain where i went wrong the amber led from te tri cree has a FV of 2.65 and 350mA i put that into the calculater i was given and got the resistor showen up top.

[darth_chasm]

You misread the specs. Ambers are 2.65v @1000mA, red orange are 2.57 @1000mA and whites are 3.15 @1000mA

[Malfegorus]

You misread the specs. Ambers are 2.65v @1000mA, red orange are 2.57 @1000mA and whites are 3.15 @1000mA


Amber Cree Part# XPEBPA-L1-0000-00C01
100 Minimum Luminous Flux @ 350mA
Forward Voltage @1000mA = 2.65v

oh ok so then what is the 100 minimum Luminous Flux @ 350mA?
and then for the amber LED i would use the 1.2ohm 3w resistor.

[darth_chasm]

A marketing term hahaha

Its a measurement of perceived brightness. Rather than getting into a lengthy, awkward reply, I'll say Google has a better answer for you.

Yep, that resistor will work just fine. Make sure you have a resistor on each die.

[Silver Serpent]

You can run those LEDs at 350mA, but they won't be nearly as bright. 1000mA is perfectly safe, and much brighter.