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Author Topic: Prizm V5.1 Wiring Check  (Read 106 times)

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Offline Maverick Hunter

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Prizm V5.1 Wiring Check
« on: January 06, 2018, 02:12:07 PM »
Hello fx-sabers! I'm finally back after a long absence from the hobby and ready to build another saber. I decided to go with a prizm v5.1 for this install and just wanted to get the final approval before I proceed.

I usually only build with crystal focus so I never had to worry too much about resistors but of course this is different. I used a DC bench power supply and Erv's tutorial for finding Forward Voltages of High powered LED's.
Here's what I got.

LED: Green Green White Tri cree

Forward Voltage of Green 1:  3.05 V @ 900 mA

Forward Voltage of Green 2:  3.19 @ 900 mA

Forward Voltage of White:  3.16 V @ 500mA

Using R = U/I   and P = U*I

Green 1:  R = (3.7 - 3.05)/0.900 = 0.72 Ohms      P = (3.7-3.05) * 0.900 = 0.59 Watts

Green 2: R = (3.7 - 3.19)/0.900 = 0.56 Ohms      P = (3.7-3.19) * 0.900 = 0.46 Watts

White: R = (3.7 - 3.16)/0.500 = 1.08 Ohms      P = (3.7-3.16) * 0.500 = 0.27 Watts

Using these calculations is how I came up with the resistor values for the High powered LED in my wiring Diagram:


Please let me know if anythings out of place I really appreciate it! Thank you!

Offline erv

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Re: Prizm V5.1 Wiring Check
« Reply #1 on: January 07, 2018, 02:09:37 AM »
I did not run the calculations again but the numbers look good to me !

Offline Maverick Hunter

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Re: Prizm V5.1 Wiring Check
« Reply #2 on: January 07, 2018, 10:26:16 AM »
Awesome! Thanks Erv for the support and all that you do for this hobby, time to build a saber!