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LED edge lighting

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Generic Eric:


--- Quote from: Nephasth on April 16, 2014, 11:14:38 pm ---
--- Quote from: Generic Eric on April 16, 2014, 09:05:49 pm ---
--- Quote from: Nephasth on April 15, 2014, 09:20:52 am ---I use 5050s on the NephRings, they work great for edge lighting.

--- End quote ---
Have you ever messed around with RGB?  Do you have any suggestions.

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Yes. Suggestions as far as...?

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I just edited the post you quoted.  In a nut shell do you use rgb 5050s?  If so, do you have a good link?  Preferably some thing I could use withe the led wiz if that is what you are using.

Nephasth:

These are basically what I use: http://www.ebay.com/itm/50-pcs-RGB-PLCC-6-5050-3-CHIPS-SMT-SMD-LED-Light-/230802137241?pt=LH_DefaultDomain_0&hash=item35bce12099

They require the use of resistors when wiring directly to a power supply or LED-Wiz, but resistors are not needed when wiring to a PACLED64. Very tiny solder points...



nitrogen_widget:


--- Quote from: SavannahLion on April 16, 2014, 11:06:59 pm ---
--- Quote from: nitrogen_widget on April 15, 2014, 12:25:17 am ---I just got a roll of 5050's from DX.com for $18 + a few bucks shipping.
I want to see if I can use them to replace a back-light in a 21" 4:3 LCD monitor.
It's an old monitor with a low resolution and parts are non-existent for it.

so if my backlight experiment fails I still have a strip of led lights to play with. :)

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It can be done. I have a 4:3 that's also slated to get the LED treatment. Unfortunately the inner shielding appears to be spotted welded together with tank armor. But I digress, here are a few articles on the topic using various techniques.

http://www.keithwakeham.com/lcd.htm
http://mycorner.no-ip.org/misc/ledback/index.html
http://filear.com/dnn/Home/tabid/41/EntryId/50/Repairing-broken-LCD-screen-backlight-with-LEDs.aspx
http://hackaday.com/2011/03/04/led-backlight-conversion-using-recycled-ccfl-inverter-parts/
http://blog.allgaiershops.com/2011/03/04/its-alive/

I can't advise you on the best way to proceed though. There are tons of articles in addition to the above attacking the problem from all angles. Enjoy.

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Nice.
Thanks.
I actually have everything apart with full access to diffusion sheets & CC tubes.
My two biggest issues are... how many strips to use & can I tie into a source on the power supply that will turn the LED's off when it goes into sleep mode.

SavannahLion:

You'll probably have to experiment to get it right on the number of LEDs. I don't see a lot of consistency in the number used in those projects other than the fact it took a couple of iterations to get it right.

Off the top of my head, there probably isn't a place directly off the power supply. I would still check but I wouldn't bank on it. I might look at the original lighting circuit for a low voltage signal or at the indicator lights for a source. You might find enough that a simple NPN transistor will do the trick. If that doesn't fly, you might be forced to build a small circuit using relays or solid state or resort to a small microcontroller like an AVR (Arduino) or PIC.

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