I wanted an accurate plot (on graph paper) of the relationship between voltage and current for a 10W high power LED.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Since you had a current limiter, I guess its hard to tell the real maximum wattage of the LED..
Thank you for doing this! It saved me some time for sure, and probably saved a bunch of LED's too, since they are advertised as good from 9v to 12v! 2 volts too many… I'm thinking of putting five of them in series and operating on 12s lipo power in my RC helicopter. 12s Lipo would be 12x 4.15v for 49.8v, declining to 44.88V since I only charge to 4.15v for long life.
Thank you, could not find an iv curve for 3×3 10W leds so was very happy with your video. Im planning to power 12 of them using the 5v and -5v of a computer power supply, hope that would work without the need of a current limiting device.
Thank u
can you get a Light meter and measure Power / Lumens ratio? I dont see a huge change at 9.5 to 10
Hi Julian, thanks for the 'real world' observations. They make a lot of sense. That is a very nice 'Buck' Module you have… Is there any chance that you could plot a 100W (32V) LED curve? It could be much shorter, an addendum. Or, since a 10W draws 1A at 10.06V, is it safe to surmise that 100W will draw 3A at 30.18V? GOOD WORK, THANKS AGAIN! (Or you could just update the 'Notes' on this YouTube with the V:A values for a 100W 32V)
LOL he rubbed one out 🙂
have you tried adding some slr lens to your LEDs? I guess if you add it to a 100 watts it's gonna be awesome.
good vid very thorough cheers
good vid very thorough cheers
320×3 960ma should be the correct driver current for most Chinese 10w LEDs. This also gives the correct forward voltage at 960 ma 9.6v/3. The Chinese data sheet is way out.
Спасибо.
I have to do this same test for a batch of 10W LEDs I have ordered. I want to run something like 9 or 12 of them in series parallel, on a 50W supply (to derate them for long life).
But I need their I/V data to know if I should use 3 or 4 in series and 2 or 3 in parallel, to match the 50 watt supply voltage and current limits.