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Author Topic: LEDs look like bulbs  (Read 5932 times)

Peppe316

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LEDs look like bulbs
« on: November 21, 2008, 05:19:44 PM »

I was just wondering if you guys  had any ideas on how to make LEDs look like incandescent bulbs (see attachment).
I've tried sanding and adding yellow/orange to white leds and that just doesn't work.
I'd really like to keep it simple as anything I have to do to a led I have to do 7-9000 times :)


Edit: I'll be working with anywhere between SMD - 3mm size leds (most likely SMD)
« Last Edit: November 21, 2008, 05:22:22 PM by Peppe316 »
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njbrad

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Re: LEDs look like bulbs
« Reply #1 on: November 22, 2008, 08:51:26 AM »

1. Here's the hard way  :roll: http://www.instructables.com/id/how-to-defuse-an-LED/
2. I've found frosted or diffused LEDs to be more common with the multi-color ones http://www.ledshoppe.com/led3mm.htm
3. You CAN get them in other colors http://www.amazon.com/Parts-Express-Red-5mm-Diffused/dp/B0002ZPC6U , but I haven't seen diffused white LEDs.

Sounds like a big project with that many LEDs
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merlinicorpus

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Re: LEDs look like bulbs
« Reply #2 on: November 22, 2008, 12:13:46 PM »

Overvolt them by at least x2 their rating.  Right before they blow they give off a yellowish light that looks like an incandecent.
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Peppe316

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Re: LEDs look like bulbs
« Reply #3 on: November 22, 2008, 09:07:13 PM »

I'll have to give those a try and see how they look. Thanks for the suggestions. 

After putting in more thought on it, the bulbs in that picture would be more than likely be more of a white color than the yellowish.  I think I might be able to get away with light car tint in front of the leds I have to make this thing work

Quote from: njbrad
Sounds like a big project with that many LEDs

Yeah it's a very big undertaking on my part. Now I just need to figure out how to power all those LEDs :)
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YucA

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Re: LEDs look like bulbs
« Reply #4 on: November 23, 2008, 07:14:06 AM »

I dont know about you guys, but if you look closely at that pic you attached, those leds just look like regular amber/yellowish-orange.  The picture itself is just VERY washed out...

You MIGHT be able to get a better effect of incandescent lighting using QUALITY white leds that wont have such a blue-ish hue along with photography filters/gel.  Or even colored transparency plastic...?...
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Peppe316

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Re: LEDs look like bulbs
« Reply #5 on: March 02, 2009, 01:11:08 PM »

Hmm, I just got a topic reply email for this thread. I forgot all about it.

Thanks for the suggestions Yuca. If the white looks odd I'll look into the gels or maybe using a small amount of the amber turn signal paint they use for models.

Anywho, here's where the project stands right now [EDIT]

Have some basic scoring and only two digits. I'm waiting on my buddy to get his cnc mill setup so we can mill the pcbs for the rest of the led matrix boards.


« Last Edit: December 23, 2010, 01:44:50 AM by Peppe316 »
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