Raspberry Pi case with fan

thingiverse

Modified case top with a recess to accept a 40mm cooling fan. Should be a push-fit (mine is) but otherwise use a couple of screws or glue. Even this small fan makes a big difference to the running temperatures under load (with one of those small sticky-backed heatsinks fitted it drops 20degC running Prime). Needs support to print, I printed with the top face-down onto the bed. I used white PETG, but only because it happened to be loaded at the time :) Edit: I'm going to try printing the other way up, the supports leave a rough surface on the outside. Printing the other way up at least leaves the rough surface on the inside.. This fan is a 40mm, 5-Volt (80mA) version, testing at the moment with it plugged into an external USB hub but later it will be wired into the 5V GPIO header.