PCIe Google Coral Dual TPU cooler

I needed to cool the M.2 PCIe Google Coral in my new Home Assistance PC running Frigate. After numerous unsuccessful attempts, I found this thread https://github.com/magic-blue-smoke/Dual-Edge-TPU-Adapter/issues/7 and, inspired by the great ideas on there, developed this.

It dropped the TPU temperature by over 10°C even with the Noctua 40x10 fan (NF-A4x10 FLX) running on only 7.7V (I used 2x100Ω and 1x47Ω resistors to drop the 12V). It starts reliably and is essentially silent at this voltage.

In addition to the Noctua fan, a 40x40x11mm heatsink and some M3 bolts are required (in addidion to the 3D printed parts). I also used some of the silicone rubber fan mounts and a half height PCIe back plate from a USB-C card as it had the correct screw spacing for the adapter card - I cut this to facilitate airflow. 

I hope others find this useful and I look forward to seeing developments and remixes (note: these are welcome for personal use and as long as they are shared with the community - but no commercial use or remixes, please).

The fan housing is removable as it clamps the PCB tightly. This also allows remixing this part to suit other fans or PC geometries.

I printed the parts in Bambu Lab PLA. PETG would be even better, but is not essential.