Notes:

• There are two accessory parts: A stripboard mount and cable strain relief.
• This design is for internal use only, ideally within a grounded espresso machine.

Parts and Mounting Locations:
This housing provides locations for:

• Arduino expansion board (with STM32 Blackpill or Arduino Nano mounted)
• PSUs (120 VAC → 12 VDC + 12 VDC → 5 VDC PSU)
• Relay
• Dimmer
• MAX6675
• ADS1x15 board
• Snubber (https://www.aliexpress.com/item/3256803573244277.html)
• Stripboard, solder bundle, or Wago terminal blocks for DC power distribution. Stripboard recommended (https://www.aliexpress.com/item/2251832661583259.html)
• 7 screws (see “Housing Fasteners” below)

Please see https://gaggiuino.github.io/#/ for build instructions.

Housing fasteners:

The housing was designed for 7 M2.9x6.5 self-tapping screws. These are the same screws Gaggia uses for attaching to the plastic fill funnel (PN DI7981P2.9X6.5I or 996530054164). Component screws (qty 2) must be no longer that 1/4 inch / 6.5 mm. Outer housing screws (qty 4) must be no longer than 1/2 inch / 12.7 mm. 
If you just want to blindly order off of AliExpress then this is an option (50pcs M3, 6mm): https://www.aliexpress.com/item/3256802230982244.html 
Otherwise, any of the following screws will work (get whichever are available in your area).

• #4-20 thread rolling screws (these are the Imperial/Standard equivalent to the Gaggia screws)
• M2.9 self-tapping screws (this callout is almost exclusive to screws for plastic)
• M3 self-tapping screws for plastic (coarse-thread screws for use in plastic)
• M3 screws (standard machine screws, not as secure as above, but will work)
• #4 wood screws (only if you have no other option)

Accessories: 
The cable strain relief is fairly self-explanatory: Zip-tie it to the cable bundle(s) just inside the housing pass-through to prevent wires from getting pulled. Don't bend the tie mount post - the part is designed to be strongest in the direction of the cables, not across.

The stripboard mount slots into the housing after soldering but before the expansion board is screwed down. It's removable so that those who still want to use Wagos, solder bundles, etc. still have room to do so. Max stripboard size is 5 rows x 8 holes plus the half edges (or 16.8 mm x 23.2 mm) as shown below. Note that it is shown unsoldered for clarity - stripboard install should be done post-assembly.

Recommended Print Settings:

PETG, 0.2 layer height, 2-3 wall lines, 235 C nozzle, 85 C bed, 80 degree support overhang angle if you're not confident in your bridging (see image recommended supports). 20% gyroid infill. No adaptive layers.

Location in Machine:

• GC recommended location is behind the funnel (GCP location will also work).
  
• GCP recommended location is oriented vertically next to the funnel (depending on the machine it may also fit vertically behind the funnel)