hand made ; alminium cap is for cooling

[pfeerick]

1 C is too miserable .

so i insert copper coin between copper heat sink and alminuim cap .
and i try

Code:

debian@pine64pro:~$ ./pi.bat ; ./temperature.bat
3.14159265359
41
debian@pine64pro:~$ ./temperature.bat
36
debian@pine64pro:~$ ./temperature.bat
36

good result

copper coin is about 0.1 dollar (10 yen) .
alminium cap press copper coin and fix coper coin .

alminium cap
heat conducting sheat(for attaching)
copper coin
heat conducting sheat
copper heat sink
heat conducting sheat
CPU

-----
regards

Thanks for the data, that was great! What happens to the temperature after the coin has been on for a few minutes? There will be an initial drop in temperature when you put the coin on (if it is cooler than then heatsink) as it will have to warm up. I would expect it would settle to the same temperatures as before. A heatsink can really only slow down temperature spikes - if your pine64's cpu is loaded for extended periods, it will eventually overwhelm the thermal mass of the heatsink, which is when you need to consider a fan / active cooling. 

That is of course, unless you go for the extreme heatsink as was done in this video.