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](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:

• hole added for 3.5mm DC barrel plug
• buttons integrated into top piece
• removed extra space used to account for screw terminal block
• increased top piece's height for better fit

I have included a STEP file of the model for your convenience.

Print Settings

Printer Brand:

Ultimaker

Printer:

Rafts:

No

Supports:

Resolution:

0.15 mm

Infill:

Category: Electronics