Part Compatability Question

[azurite2]

I'm quite new to the saber building scene and I was wondering if these parts would work together, I had to switch to the prizm board because the NB V3 sold out before I could buy one. I appreciate the help and look forward to building my first saber!

-Grayson M.

-Prizm Sound Module V4
-MHS Heatsink V3
-Cree XP-E2 copper Star LED
-Cree Star lens holder
-8.7 Deg Optics
-Thermal tape pad
-JST male connector Blue- White+ 24AWG
-NB V3 MWS Header and Wiring Harness
-Premium 28mm Speaker
-TrustFire Protected 3.7V 2400mAh 18650 Lithium Battery
-16mm Anti Vandal Momentary Gold Plated Switch

[rlobrecht]

-NB V3 MWS Header and Wiring Harness -- this will not work with the Prism

-JST male connector Blue- White+ 24AWG -- what did you intend for this to connect to?

-TrustFire Protected 3.7V 2400mAh 18650 Lithium Battery -- this needs a battery holder

You'll also need a resistor for your LED.

Good luck.

[bunger]

If your switch is lighted, you'll need a resistor for that as well.

[azurite2]

Alright, thank you I think I might switch to a:
-7.4v Li-ion 2600mAh 18650 Battery Pack w/ charge port

One of my friends that builds sabers recommended this:
Red/Green/Royal Blue Cree XP-E2 CopperNova -will this allow me to mix the colors with the Prizm? Also do you happen to know what resisters I should use or will I need to go figure it out.

[bunger]

Yes you can color mix with the Prizm.

The Prizm only takes a single 3.7v battery.

For resistors: search the boards and read the Prizm manual on Plector Labs site.

[azurite2]

Alright thank you!

[azurite2]

Will I have enough power for this led (http://www.thecustomsabershop.com/RedGreenRoyal-Blue-Cree-XP-E2-CopperNova-P1016.aspx) with a 3.7v battery (http://www.thecustomsabershop.com/Panasonic-Li-Ion-18650-37V-3400mAh-PCB-Protected-Rechargeable-Battery-P853.aspx?ItemId=5487856)?

[Silver Serpent]

Yes. That battery solution will work for that LED.

[azurite2]

Thank you I'm glad that will work. I'm having a horrible time coming up with the resistor calculations, can you help?

What I got (which is probably wrong):
LED 1 - 0.035
LED 2 - 0.325
LED 3 - 0.085

[Silver Serpent]

Those values are not correct.

From FJK's sticky post on Ohm's Law: Resistance (Ohms) = (Voltage of battery - Forward voltage of LED) / Current.
Note: when calculating wattage for LEDs run at 1000mA, the wattage will be equal to the ohms. Yay for easy math!

Your battery has a voltage of 3.7v. Your LEDs have forward voltages of 3.58v (green), 2.59v (red), and 3.41v (royal blue), and they all run at 1A (1000mA).

For the green, the math would be: R = (3.7 - 3.58) / 1 = 0.12 ohms. You'll want a resistor that is at least 1/8 ohm, 1/8 watt. There's a 0.47 ohm 0.5 watt resistor in the store that will do the job quite well. I'll leave the other two for you to calculate.

[azurite2]

Those values are not correct.

From FJK's sticky post on Ohm's Law: Resistance (Ohms) = (Voltage of battery - Forward voltage of LED) / Current.
Note: when calculating wattage for LEDs run at 1000mA, the wattage will be equal to the ohms. Yay for easy math!

Your battery has a voltage of 3.7v. Your LEDs have forward voltages of 3.58v (green), 2.59v (red), and 3.41v (royal blue), and they all run at 1A (1000mA).

For the green, the math would be: R = (3.7 - 3.58) / 1 = 0.12 ohms. You'll want a resistor that is at least 1/8 ohm, 1/8 watt. There's a 0.47 ohm 0.5 watt resistor in the store that will do the job quite well. I'll leave the other two for you to calculate.

Ok so for the others I got Green-0.2, Red-1.2 and blue I got 0.3. How do I use those values to come up with the resistor I want?

Edit- I figured it out, it should be 2, .47ohm .5w resistors and 1, 1.2ohm 3w resistor.