campus189
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They'll probably be okay. It's not so much a matter of having them exactly 2.7k as having them all the same. They're cheap enough to use for soldering practice. I soldered badly for years before discovering the magic of flux.
That's rosin, not resin, though it's made from pine sap. I made my own flux once just to see how it was. The flux in the solder core isn't adequate for SMD soldering because it boils off before you can complete the joint. The wattage will be ⅛W or ¼W for the size part you're using but won't matter.Doesn't resin core make it all that much easier? Also, you never stated watts1/8 , 1/4 , 1/10 , 1/16 does it matter?
Running at 3.0v has been running 4 hours now, no heating issues at all.
Would I get the 3.1v by using the 2-1.5Ω resistors in parallel?
It's plenty bright enough with no heating, but when the 1.5k Ω was bypassed I got 3.3v on LEDs
Almost forgot, total draw with dc to dc converter is around 200mA, I like that, small draw
Flea bay doesn't have the resistors, ill have to scroll through your posts here to order them.
So should I order both kinds of resistors? Or just the .75 Ohms
1/4W or 1/2W ? (only draws 200mA ) I would think 1/4W would work
I did some testing with my Ningbo light and it turns out that the Vf of the LEDs is 3.4 when running at 480mA. You should try running one of yours with no resistor (bypassed with wire) on the LED board directly from the 3.4V converter output while measuring the current. If it's more than 480mA, disconnect it immediately. If it's less than or equal to 480mA, let me know what the measurement is.
you can try 4 series connection of white LED without dropping resistor.
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