Lenovo Smart Clock 2 DIY Programming Pogo Pin Dock

This model is a DIY dock for the Lenovo Smart Clock 2. It allows access to the USB interface on the bottom of the dock for connecting to a computer to access and program the smart clock, e.g. accessing it as a MTP device or to connect via ADB or Serial interfaces to reprogram it. See the XDA forums for ideas: Lets get started on the Lenovo Smart Clock 2! | XDA Forums (xda-developers.com)

To use this model:

Printing

I printed with:

• PLA
• 0.4mm nozzle
• 0.2mm layer height
• no supports
• 15% infill
• 3 perimeters where I felt that it resulted in a cleaner print.

You'll need:

• One Stand
  • Note: Can be printed without supports by printing on its face and setting an appropriate bridging material angle to minimize the bridged spans. I used 45°.
  • Note: Can be printed with shorter legs by cutting the model in your slicer or setting the maximum layer lower to simply not print more height than needed.
• One Blank Plug to fit in the long side
  • Can be printed without supports with the rectangular face down.
• Only one of the Pin Plug options according to the pogo pins/connector you want to use
  • 0.7mm needle pins, e.g. https://a.co/d/98TRcYy 
    • Note: Holes in the Pin Plug are approx 1.1mm in diameter, which works on my printer to produce holes of nearly the correct 0.7mm diameter in the resulting print. I clean these up with a 0.7mm drill bit and a pin vise, and others report success clearing the holes with a needle. YMMV if you have tuned your printer better than I :-)
    • Can be printed without supports with the rectangular face down/pins up.
  • Preci-Dip 2x4 Spring-loaded Connector part 813-S1-008-10-016101: 813-S1-008-10-016101 | Preci-Dip, 8 Way, 2 Row, Straight Spring Loaded Connector | RS (rs-online.com) (Also available from sources like DigiKey, Mouser, etc)
    • WARNING! Not Yet Tested! I've designed this plug based on the schematics from the datasheet but don't own a connector to test with. Please let me know if it works for you :-)
    • Can be printed without supports with the rectangular face down/pins up

… or edit the Fusion 360 source to further customize all the above to your needs.

Then assemble the parts (they fit loosely as I overestimated the tolerances) and let gravity hold them together, or tack them together with glue. I used a bit of super glue/cyanoacrylate.

Wiring

See the close up of the wiring in the photo. This wiring follows the standard USB cable convention: Green=Data+, White=Data-, Black=Ground, Red=VBUS/5V. See the XDA forums thread above for further pinout & discussion (e.g. the other pins I've not populated in this set of photos). Note that the wires approach from below.

What to do Next

Up to you :) See the XDA forums for ideas on customizing the Smart Clock 2 firmware, or consider building your own dock & peripherals!