i think the size is specified here.pcmanbob wrote: ↑Thu Jan 25, 2018 11:34 amFirst question does the case have provision for a fan to be fitted, that will dictate size, if not you need to figure out were you can mount one and that will dictate size.
you can get small 5V fans from amazon, eBay and many other online stores.
If you just want it running all the time connect it to the 5V and Ground pins on the gpio header, if you want to control speed & on/off you will need a transistor circuit to switch the 5V.
if you have a size specification then that's what you need to take in to account when looking for your fani think the size is specified here.
blowing cool air in to a case is probably the normal way of doing it.do i need to make the air in or out?
Hot air rises, so let the fan blow the same way rather than fighting it. I doubt it makes much difference, though.
A heatsink inside a case without a fan will only delay overheating slightly. If you insist on using that case, then a heatsink and fan would be best, but a fan alone will work better than a heatsink alone.
i'm using the pi 2HawaiianPi wrote: ↑Sat Jan 27, 2018 2:30 amA heatsink inside a case without a fan will only delay overheating slightly. If you insist on using that case, then a heatsink and fan would be best, but a fan alone will work better than a heatsink alone.
Of course this all assumes you are going to be running a Pi3 very hard and want maximum performance. Under normal use a Pi3 won't overheat often, and it will throttle down to protect itself it if does. If you are not planning on pushing your Pi3 super hard for an extended period of time, then you might not need either.