fungus:
MatCat:
I have been thinking about all of these factors and I know that any sort of linear DC-DC is going to dissipate a LOT of wasted heat and considering the plane is made of foam excess heat is not preferred :).At least you won't have a problem with airflow...
Actually no I won't ROFL, I just did a mounting test as pictured below, zip-ties go through a flattened copper tube to hold the LED star on which makes direct contact with the copper, this is in turn zip-tied to a wooden dowel, which is hot-glued to a piece of foam. Now the LED star stabalizes at 160F when running at full blast (350ma), the back end of the copper as shown get's up to about 140F, and between the wooden dowel and the foam 111F, where the hot glue is doesn't even get above ambient, so I think all is fine.
But my question remains from above, can I drive both a red (2.2v FV), and a green (3.8v FV) which both have 350ma operating capacity from a 700ma constant current sink and have them equally split the current (5v source), or will I need a resistor on the red to keep it from sucking up more current then green?