Hi Everyone, I am working on a very small LED lighting project that I am trying to gain as much luminance as possible with the least amount of components.
The application is for a large metal mask that is to lit up from behind. The mark is about 16" wide x 18" tall.
I am planning to use the proposed pcb layout to accomplish my task. The SMD's used are white 1.2mm LED's that put out 160mca @ 10mA, they work off of 3.5-4V.
Using ohms law, plugging in 3.5V @ 10mA = 350Ω @ 35mW (per LED).
Using 2 leds, 7V @ 20mA = 350Ω @ 140mW (total). I assume twice the W rating for my resistors, and since I am only @ 140mW, the closest rating to 1/4W is 1/2W, this is what I will be using.
I ask that this math be checked as I am a first timer for LED circuits. The attached layout is my proposed PCB for the project.
If anyone has insight to a brighter / compact / low power update to my current design, by all means let me know.
Thanks in advance everyone.
The application is for a large metal mask that is to lit up from behind. The mark is about 16" wide x 18" tall.
I am planning to use the proposed pcb layout to accomplish my task. The SMD's used are white 1.2mm LED's that put out 160mca @ 10mA, they work off of 3.5-4V.
Using ohms law, plugging in 3.5V @ 10mA = 350Ω @ 35mW (per LED).
Using 2 leds, 7V @ 20mA = 350Ω @ 140mW (total). I assume twice the W rating for my resistors, and since I am only @ 140mW, the closest rating to 1/4W is 1/2W, this is what I will be using.
I ask that this math be checked as I am a first timer for LED circuits. The attached layout is my proposed PCB for the project.
If anyone has insight to a brighter / compact / low power update to my current design, by all means let me know.
Thanks in advance everyone.
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