Mobile Teacher Tool, Rev 2 by Gerhard

It is always great to see if someone is picking up my work and produces something even better :-). In this case, Gerhard Székely took my DIY Portable Video Conference, Sharing and Teaching Device and created an awesome version of it:

Camera to the front

Camera to the front

The ‘mobile teacher’ device comes with everything integrated into a single enclosure. The enclosure size is about 21×23 cm.

mobile teacher device (closed)

mobile teacher device (closed)

Two magnets hold the cover for the camera compartment:

Open Camera Compartment

Open Camera Compartment

The camera can be moved out and depending on your needs point in any direction. The enclosure is used as a camera stand.

Camera downfacing

Camera down-facing

Camera to the front

Camera to the front

Camera Stand

Camera Stand

 

Box Back Side

Box Back Side

Mobile Teacher Device (open)

Mobile Teacher Device (open)

A really cool idea: Gerhard is using a ‘sliding-in U’ to keep the speakerphone in place. Two pieces of a ‘U’ shaped MDF are glued together to lock the speakerphone:

Enclosure open

Enclosure open

Sliding U

Sliding U

The CAD files are available on GitHub, for example the STEP file for the camera holder and camera enclosure:

step file in FreeCAD

step file in FreeCAD

A file for the laser cutter for e.g. 4 mm MDF is included too:

Laser Cut Plan

Laser Cut Plan

BOM

Below is the list of material used. Be free to change for your needs:

  • 4 mm MDF (or PMMA) for most parts (sheet size ~A2). There is an extra ‘U’ with a 6 mm MDF to hold the speakerphone: alternatively it can be built with two thinner MDF parts
  • 3D printed parts (step file provided)
  • 10 mm aluminum rod: buy a 1 meter piece and cut it
  • 4x 4x4x4 mm magnets or similar to hold the enclosure: glue them inside the enclosure (clean surface first with alcohol)
  • 4x washers as counter piece for the magnets, glued on them on the cover
  • smaller wood pieces depending on your needs (e.g. triangular piece inside the enclosure
  • wood glue, instant glue, hot glue (e.g. for USB port)
  • 8MP auto-focus camera: the same one I used in my previous design:
    https://de.aliexpress.com/item/4000515607605.html

    8MP Autofocus Camera

    8MP Autofocus Camera

  • USB port (important: one with a long extension cord to be able to place it far from the computer), e.g.
    https://de.aliexpress.com/item/4001179448555.html?spm

    USB Hub

    USB Hub

  • Speakerphone, e.g.
    https://de.aliexpress.com/item/4001164642809.html

    Speakerphone

    Speakerphone

Summary

I love the details of the new design Gerhard did: very clean with innovative ideas I have to pick up for a next iteration of my design :-). I hope this inspires you all for new ideas, and maybe you build now your own portable teaching and conferencing device? Thanks Gerhard!

Happy Conferencing 🙂

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