rpi-cool-hat

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rpi-cool-hat

At least Raspberry Pi 4 makes additional cooling mandatory.
Most cooling solutions (all but oil?) do not allow stacked HATs (and at least musicians do not accept built-in audio).

This KiCad project suggests a glue-PCB letting coolers and HATs live in peace:

RPi is connected left / HAT connected right / cooler's fan connected to pins in the back as (example pictures are 180°rotated):

Note that the project:

was created by Kicad 5.1.5 as shipped by Fedora 30
's author is not a professional layouter - awaiting PRs/issues - teach me :grin:
was tested with HifiBerry DAC Pro and Flatmax AudioInjector
IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND!

If you want one:

drop rpi-cool-hat.kicad_pcb to a supplier of your choice
if your supplier does not accept Kicad: clone this project, go through gerber and send that to your supplier. To get an idea of how to accomplish it might help to watch https://www.youtube.com/watch?v=ENmDnoKs2hM
or visit https://aisler.net/p/IRBRWUAC. Note that the author has no relation to Aisler. It was chosen because their production was considered close at time and place of writing.

Tips:

Start soldering with J1
When using Ice Tower Cooler cables are a bit short. To get around: Unmount fan, rotate 90° clockwise and mount again. Be careful not to over-tighten screws!
For Ice Tower Cooler noise can be reduced significantly by using 3.3V supply on J1 (as written in the handbook). With reduced voltage I never saw CPU temperature rising above 45°
If space is limited one might want to use a 90° variant of J2:

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rpi-cool-hat

At least Raspberry Pi 4 makes additional cooling mandatory.

Most cooling solutions (all but oil?) do not allow stacked HATs (and at least musicians do not accept built-in audio).

This KiCad project suggests a glue-PCB letting coolers and HATs live in peace:

RPi is connected left / HAT connected right / cooler's fan connected to pins in the back as (example pictures are 180°rotated):

Note that the project:

was created by Kicad 5.1.5 as shipped by Fedora 30

's author is not a professional layouter - awaiting PRs/issues - teach me :grin:

was tested with HifiBerry DAC Pro and Flatmax AudioInjector

IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND!

If you want one:

drop rpi-cool-hat.kicad_pcb to a supplier of your choice

if your supplier does not accept Kicad: clone this project, go through gerber and send that to your supplier. To get an idea of how to accomplish it might help to watch https://www.youtube.com/watch?v=ENmDnoKs2hM

or visit https://aisler.net/p/IRBRWUAC. Note that the author has no relation to Aisler. It was chosen because their production was considered close at time and place of writing.

Tips:

Start soldering with J1

When using Ice Tower Cooler cables are a bit short. To get around: Unmount fan, rotate 90° clockwise and mount again. Be careful not to over-tighten screws!

For Ice Tower Cooler noise can be reduced significantly by using 3.3V supply on J1 (as written in the handbook). With reduced voltage I never saw CPU temperature rising above 45°

If space is limited one might want to use a 90° variant of J2:

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