We’ll see who comes up with the best cooling solution. There’s a guy on youtube who took a 60mm, 12 volt fan to cool his Raspberry Pi. A 12 volt fan connected at 5 volts runs slower and quieter. I don’t know if having a flat piece of copper with a 60mm fan is going to fit or fix the problem. I was thinking maybe you could intake from the Larkbox outtake and blow the air out the top, which has more area on it.
The tiny squirrel cage fan isn’t very awesome at all. I measured it at 35mm x 35mm x 7mm tall. There is a little screen in the top of the Larkbox that can be taken out to gain a little height (and probably gain a little more air flow), but I’m not sure how much height you can gain.
I tried taking the little metal cover off the squirrel cage and it sounds a little better, but doesn’t cool well. I thought maybe the top of the Larkbox case was close enough to make a syphon. I was getting runaway, it got up to 105 celcius before I stopped the stress test.
You know, I do have an Odroid with a 2 pin fan that they are able to control. Maybe with PWM. I don’t know if that’s possible on the Larkbox.
The problem is that this thing is too small to cool quietly. I have an Odroid H2+ with an entirely passive cooler on a J4115, but the heatsink is approximately 100mm x 100mm x 25mm. It’s very big.