Geekworm X302 HiFi DAC HAT Enclosure

This enclosure was designed to fit the Geekworm X302 DAC board for the Raspberry Pi Zero W / Zero 2 W. I dimensioned the internal space using the Geekworm PCB drawing found here with a +.2mm tolerance on all 4 sides. For my board, it was a perfect (tight) fit. I did need to file the holes for the left-right RCA jacks just a bit to make them more truly round after printing. 

I found the RCA connectors on the DAC board to be a little bit flimsy, so I included a support feature into the enclosure lid to help with strain.

Hardware Requirements

• 4x M3 heat inserts
• 4x M3 screws, any length between 5mm and 25mm (if using longer fasteners, make sure they're fully threaded)

Printing

There are two printed parts: a body and a lid. Both parts are necessary.

I printed mine on a Prusa Mini+ with a .6mm nozzle with the following settings:

• Atomic CF PETG filament
• 100% infill
• .3mm layer height
• No supports or brim

After printing

• Perform any necessary post-processing (sanding, filing-to-fit, etc.)
• Install the 4 M3 heat inserts into the 4 corresponding full-height holes in the enclosure body

NOTE: If using shorter M3 fasteners to attach the enclosure lid, install the inserts into the top of the enclosure body. If using 25mm fasteners and they aren't fully threaded, you can install the inserts into the bottom instead. 

DAC Installation

1. Attach your Pi Zero W / Zero 2 W to the DAC board, but do not install the MicroSD card. 
2. Align the RCA connectors on the DAC board with their corresponding holes in the enclosure body, and angle the board so that the bottom is touching the enclosure body. 
3. Gently push the RCA connectors into the holes, and as soon as the opposite end of the DAC clears the enclosure wall, pivot the board down while continuing to push the RCA connectors through the holes.
4. Ensure the top of the USB connectors are flush with the top of the enclosure wall. The DAC board should essentially “click” into place. It will be a tight fit. No fasteners are necessary to hold the DAC board in place.
5. Install the MicroSD card through the slot in the side of the enclosure.
6. Apply power and ensure the Pi/DAC works as intended.
7. Install the enclosure cover with the M3 screws.
8. Optionally - mount the enclosure to a surface using the screw holes on either side of the enclosure body.