FOSDEM box 3.0 – mechanics

[dexterlb]

• Determine what screws to use for affixing the baseplate to the box

  • The currently-used (M3) screws easily come out of the plastic, destroying the "thread" in the process
  • Get a few screws like the B3.5X6.5/BN33 but different lengths and diameters and see which works
  • Purchase the final screws

• Fan bracket mounting

  • Buy bolts for the fan bracket: B3X16/BN20
  • Redesign the fan bracket to use the B3X16/BN20 bolts (need to make the head holes conical)
  • The brakets are mounted to the baseplate with BN1593 bolts (same as the display mount)

• Design new front panel

  • Fix location of front audio jack hole
    • Move it left (towards the XLRs) by 1mm and down by 0.5mm
  • Add fazants
  • Move the XLR labels so that the XLR pin doesn't hide them'
  • Move the USBs hole 0.8mm up and 0.8mm left

• Determine what cables to order

  • 3.5mm audio jack cable for stripping presenter audio - we already have those
  • 25 cm MicroHDMI to HDMI for the video output from the radxa

• Dual hagibis stack (we will not do this at the moment)

  • Determine if we need extra USB3 A-A cables: we planned for one short cable and one long cable, but the new boxes require two short cables (for the hagibises) and one long cable (for the passthrough port)
  • Design 3D-printable standoffs for the two-hagibis stack
    • Standoff height: 15mm
    • Ideally, there would be a way to leave the standoffs and respective bolts in with just a single hagibis, so that the box can be easily
  • Determine what bolts to use for the two-hagibis stack (is there a M4 hex2 option available anywhere, or do we need to settle with hex2.5?)
    • Bolt length: 20mm
  • Dual-stack hagibis HDMI holes in back panel
    • Add a second set of HDMI holes 16.2mm above the current ones