Some variants of the C51 4-bit clock kit use a 3.5mm DC barrel jack for its power source instead of a screw terminal block. For example: http://www.icstation.com/bits-digital-electronic-clock-at89c2051-chip-kits-soldering-practice-learning-kits-module-p-1765.html
This is a remix of mouseas's Clock Kit Case (v4) with the following differences:
I have included a STEP file of the model for your convenience.
Printer Brand:
Ultimaker
Printer:
Ultimaker 2
Rafts:
No
Supports:
No
Resolution:
0.15 mm
Infill:
18%
The author marked this model as their own original creation. Imported from Thingiverse.