Re: Led back light
I've just ordered the maplins ones. Will update once fitted
Led back light
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Re: Led back light
Would it be easier to find another strip and graft the working LEDs togetherLeave a comment:
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Re: Led back light
"The maplins are 350 that OK?' yes, you are going to be running at the lower current, but I do not know if it will have color shift at lower current drive or not. The existing strip is probably using the copper pads for heatsink, so if this LED should be able to handle it, we still do not know what your LED strip look like, the original probably does not have good thermal management either so they burn out.Last edited by budm; 10-14-2015, 02:27 PM.Leave a comment:
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Re: Led back light
http://www.maplin.co.uk/p/white-led-n67jq
These?
My board has 5 LEDs and says vf max 18v so I assume each led is 3.8v Ish?
Says if= 320ma the above is if 350ma. That ok?
So you will be running at lower current which will be fine, I also doubt that they are running them at MAX If.Leave a comment:
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Re: Led back light
http://www.maplin.co.uk/p/white-led-n67jq
These?
My board has 5 LEDs and says vf max 18v so I assume each led is 3.8v Ish?
Says if= 320ma the above is if 350ma. That ok?Leave a comment:
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Re: Led back light
What does the one in the panel look like?Last edited by budm; 10-14-2015, 02:09 PM.Leave a comment:
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Re: Led back light
The meter didn't power them had to use a battery. Have 6 LEDs out. 8 strips of 5 led and 3 on 2 strips gone. I've removed the bad ones... Any idea where a can get replacements?
Spell check -- traitor = resistorLeave a comment:
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Re: Led back light
It wont be too noticeable the brightness difference and what do you mean by traitor ?Leave a comment:
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Re: Led back light
Ok I will check them all and when I find the bad one I just solder the traitor in its place and it should resume normal function? Minus some brightness of courseLeave a comment:
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Re: Led back light
i test led's with an old coincell from a motherboard - i have lot's of used ones.Leave a comment:
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Re: Led back light
The meter will have enough juice to dimly illuminate the leds.Leave a comment:
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Re: Led back light
You should put the current limiter resistor in series with the power source when you try to test the LED.
http://led.linear1.org/why-do-i-need...r-with-an-led/
https://www.sparkfun.com/tutorials/219Last edited by budm; 10-14-2015, 10:00 AM.Leave a comment:
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Re: Led back light
That's what I was referring to... What if the meter doesn't output enough voltage to illuminate it. So 3v should be ok?
Bush bmk40Leave a comment:
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Re: Led back light
Be aware that multimeters vary greatly in the output voltage when in diode mode. For example, the Fluke 87V will output more than 7V in diode mode. I have a Brymen meter that only outputs 1.5V in diode mode.Leave a comment:
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Re: Led back light
LEDs will be open, short or working, if its short your meter will show this, if it is open it will show that also, and if it glows its working. You fail to tell use the make and model number of the set you are trying to fix? not all LEDs are the same voltage ?Leave a comment:
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Re: Led back light
then the LED is duff..a 3v supply to each individual diode should provide illumination.
Often,the led itself is visually burnt.
Good luck!Leave a comment:
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