HexCase2 DomeTop Raspberry Pi 4B Case

HexCase2 is a Pi 4B case with a Domed top to fit taller Hats and the Noctua Fan.  This is a new hole pattern with an improved snap for top and base.

Screwless Snap Assembly.  

Start with base or bottom case, remove ssd and drop Pi4b board into bottom case so that it rests in provided IO openings correctly.  Fit should keep board in place even with a little shake. Place fanframe-w-standoffs.stl or ScrewlessJack.stl onto Pi 4B board matching posts with screw locations.  Top will snap onto the base, holding the screwless jack onto the Pi 4B board and keep it in place.

There are 2 top versions, Domed and Flat  Each top has relief and boss locations on the RJ45/USB ends, top parts are not flipable and must be assembled in the correct orientation.  There should be an even part line between top and base.

There are 4 Standoff versions for different fan options and non fan uses, screws and boss combinations with 40mm or 30mm fans.

To dissassemble the case.

1.  Remove the SSD card!  

     2. To remove top cover you can use a hex wrench or paper clip/ finger nail to pry up the top           near the USB/RJ45 IO area.

     3.  If no screws were used simply remove fan cables, fan, stand and Raspberry Pi 4b.  There should be no resistance as long as you have already removed the ssd card.

Screws. There are 4 screw boss located in the base if you want to use a hat board

M2.5 (a set of 4 screws and nuts needed... 4 standoffs and another set of 4 screws for Hat Boards) . The platform for the MLB is a snug fit, so it is possible to skip the screws).

Parts for optional assembly

Dupont connector for GPIO connections.

10mm (Brass/AL or plastic) standoffs for fanframe-no-standoffs.stl and  30mmmfanframe-nostandoffs.stl.

Compatable models on Printables.com

The base is identical to the HexCase2 Flat top model.

CPU takes 9mm tall (9.4mm) Heatsink...

Fan fits into fan frame snugly, no screws required. M2.5 screws needed on bottom of case to secure Pi4B board to standoffs.

The Stand keeps the Pi4b PCB in place from the fit/force of the top as it snaps into the base.

To Remove Top use a finger nail or thread an allen wrench under the top hexagonal vent pattern near the RJ45 and USB connectors.

Do not force remove the Pi4B from the case if MicroSD is still inserted, Pi4B should fall out of case, no force needed.

Noctua 40mm fan fits into Fan frame

Fan support with 10mm CPU to Fanblade (8.5mm to frame other chips)

I place heatsinks on chips and run fan in the following configuration…

Wiring:  Warning!

Follow these instructions at your own risk… not an EE… not tested fully (Ubuntu Server only)

I wire the Noctua 5V, 4 wire PWM 40x40x10 fan directly to (Pins 4, 6, 12, and 18).

Red wire to 5V (4)

Black wire to ground (6)

Blue wire  for PWM to GPIO18.    (12).         (NOTE : Must edit python script-it is set to 14!)

Green wire for RPM to GPIO24.   (18)

Python script (FanProportional.py) from Michael Klements

https://www.the-diy-life.com/connecting-a-pwm-fan-to-a-raspberry-pi/

Stress Test: ~62C

https://core-electronics.com.au/guides/stress-testing-your-raspberry-pi/