HEATSINKS ?

[Discovery]

[TommyBoy]

Did you see the link i posted ?
It reveal some times big difference in read out temperature.

Please direct me to the frost update ?
What is it about ?

[Discovery]

Frost_dk's mods give much better sound clarity, and also slow the processing down a little so might benefit your temperatures: tweaking-the-audio-performance-rpi3-t4301.html Have fun! Ask if unsure.

Yes, I read the article. Regardless of measurement inconsistencies, my 'finger test' still says 'warm'...

[TommyBoy]

my temperature issue is solved
cause1 : shiny heatsinks do not radiate heat as IR
cause2 : system inside closed case with no moving air = result same as no heatsink
cause3 : inside of case also very shiny = also reflect heat, so outside of case was Cold, inside burning hot.
fix1 : changed heatsinks to larger Black coated types = radiate heat IR, even if air dont move.
fix2 : painted box Black mate inside pick up IR, and drilled air holes in case.
NOW the CPU is 22 C colder and i am happy.

[Discovery]

Good news.

I do wonder why vendors sell heatsinks with colours other than black, when matt black surfaces radiate heat better than any other.

[TommyBoy]

on a non painted heatsink there is no difference in temperature IF there is plenty of moving air !

but huge difference if the main transport of heat is done via RADIATION
(in a non air movement application)

paint or anodizing cost Money.

[Discovery]

Hi TommyBoy,

You made me worried so I bought some heatsinks for my Pi. It's now down to 27 deg, after extended playing but then it wasn't that hot in the first place. Still, better safe than sorry!

In fairness, I should advise that my Pi is currently running naked in the open. This is as a result of fboe's mods to add new power regulators. However I am about to put my LPS, RPi and the new regulator board in a large dedicated aluminium case so the heatsinks are to ensure it continues to run cool in a vented enclosure. And, of course, I'll be spraying the inside (and outside) of the case matt black before I complete it.

All the best,

Trevor

[TommyBoy]

hi Trevor, i am super happy you could use my experiance for something
I just updated this page
http://webx.dk/oz2cpu/raspberry_player/ ... player.htm
you can see my super large heatsink