General COB or Bridgelux Vero 18 cooling

Mellodrama

Mellodrama

Well-Known Member
I can tell you from personal experience those damned Intel fans are very noisy at 12V. If you drive them at 6 or 7V you'd probably be OK. How would you attach the COB's?
 
Mechmike

Mechmike

Well-Known Member
Those heatsinks should be more than enough for the Vero 18. I agree with the fan noise may be high at 12v. A potentiometer or a 5-6v power supply should reduce the noise while still providing adequate airflow.
 
Mellodrama

Mellodrama

Well-Known Member
bicit, do you have any of those? I'd be very curious about the outer dimensions of the flat area at the base. I bought a few of those Ideal COB holders but they're too big for the heat-tube style heatsinks I've got layin' around. To install them properly you need a flat surface that's larger than the holder.

The CXA30 COB holder is roughly 2.4 inches (62mm) corner to corner, and about 2 inches (51mm) across the narrower cross-section. In other words, it's 2.4 inches across the longest axis, where those white plastic arms are located, and about 2 inches across the narrowest axis.
 
WDIK

WDIK

Active Member
Mellodrama said:
I can tell you from personal experience those damned Intel fans are very noisy at 12V. If you drive them at 6 or 7V you'd probably be OK. How would you attach the COB's?
Click to expand...
The plan (which can always change) is to have the COBs mounted to a board, and mount the heatsink and fan to the board. Thermal compound in between.

I ordered 8 of them. I'm impatient like that. :) I couldn't pass them up for $5.25 each including shipping. Unless the noise is extreme, it shouldn't be a huge concern.

I will let you know what I find out, as I plan to test whenever my drivers show up.

ETA: I should not have asked the question when my intention was to order them anyway. Poor forum etiquette on my part.
 
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