New birdNET case requires math

 

Instead of using an RPi3, I decided to stay with the RPi4 for birdNET, in anticipation of it also hosting a camera and media player for when there are people outside socializing. 

Pi4's really need active cooling. This is an old CPU cooler fan running off 5 volts instead of the rated 12v. It is quite quiet as a result. I might raise that voltage. The CPU is reporting 50C, and previously I had it down to around 40-45C with the case open. Or maybe drill more holes to improve air flow through the case.

The reducing shroud to fit the fan on the case is made from a yogurt container and my ghetto 3dprinter (aka hot glue gun) welded the three pieces together. Had to remember how to project a section of a cone onto 2D!

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