TBH I just use an app on my phone that does the calculation for me, and then recommends a resistor to use.
TBH I just use an app on my phone that does the calculation for me, and then recommends a resistor to use.
Okay I think my math was right but my confusion was he seemed to be rounding down on some of his numbers instead of rounding up. Using 3.7 as the battery V I got 1.1 Ohm needed for the main red and a little over .25W needed for those others- assuming my calculations are right. I guess it's safe to round down a little?
Worth a watch.
https://youtu.be/S5IICsTwTYE
https://youtu.be/T8Z2EFrbtpU
Yeah, even my app is telling me that the Red should have a 1.1o 2w resistor on it (calculated 1.11 o, 1.1w), so the 1.2o 3w should work. The 1o 2w resistor that's currently on there is probably letting a bit too much power get to the die. I suppose that explains why my color mixing hasn't quite given me the results I've expected based on the values I've put in - too much red getting through.
Last edited by gerrylum; 05-22-2017 at 10:54 AM.
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