20221215 The COB LED

20221215 The COB LED

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While waiting for my PCB to arrive, I decided to just play with some COB LEDs. These chip-on-board LEDs are quite bright. But, they are usually configured to work at 12volts. It was quite a challenge to find one rated at 5volts or less and have a diameter of 40mm.

In the end, I got these. Although the diameter is 40mm, its aluminum heat sink is 50mm and so, fitting into the Razor Crest is out of the question. These are COB LEDs which operates at 3.7volts but commands 1700mA current. So, yeah, I’d need to find or design a LED driver specifically for it.
I did not measure it but looks like the thickness is about 1.2mm or more.
Just for fun, I plugged it directly into a 18650 LiPo battery. SInce I do not have a LED driver, the CPB LED sort of just glows.
But this is still exciting because I can see how effective the lighting is. I can also go for a smaller diameter COB but I would need to move the LED back and also, scuff up the clear part to diffuse the light.
I had to edit this image a little to put in more yellow as the Huawei shot came out whitish
20221215 The COB LED
The COB I was looking for must be a completely filled circle. This is to light up the middle area as well.
Anyway, with the low current, you can see the actual LEDs in there. If I had a driver which can generate 1700mA, the whole engine would be too bright.

On a second thought, the middle area looks kinda good, almost like the effect from the show.

Posted in A Piscean Works Blog, AMT, Electronics, Lighting, Model Kits, Razor Crest, Scale Lighting, Scale Models, Sci-Fi, Spaceships, Star Wars, The Mandalorian.

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