I'm making a heatsink for my robots components. It'll be actually a simple plate of alluminium, cut down and drilled to certain mech. specifications. Now, will it be better (in terms of dissipating heat) if I spray it black (normal car spray, eloxation is not possible), or leave it silver (default surface)?
Ofcourse, I'd prefer it to be black, due to aesthetical reasons, however, if it would perform (considerably) better, I'd keep it normal.
Google gave me everything I wanted to know about cooling my PC with massive slabs of copper, homemade water cooling and even this: http://www.markusleonhardt.de/en... and I've seen that a lot of people leave the side of the component normal, and paint the rest of the heatsink black. Is that better?
What do you think?
The parts on the heatsing (isolated, don't worry ;-) ): 7805 converting 16-12V to 5V at approx. 100-200mA, 78S12 (or some low drop equivalent, any tips?) Converting 16V to 12V at max 1.8A.
PS: I know this is more of a mechanical question, or maybe physical, or something like that, but it has to do with electronics and not with AVRs, so the Electronics forum is a good place IMHO. :-)