Tentaku Mechanical Calculator Case

Tentaku Mechanical Calculator Case

Background:

I had a lot of fun building my Tentaku DIY Mechanical Calculator kit, but the included case was a somewhat flimsy acrylic sheet. 

I wanted something a bit more bulky to protect and hold my calculator.  So I remixed @Adafruit's Macropad RP2040 case to work with it.

My model uses everything from the Tentaku Kit except the back acrylic sheet.  You should be able to slide your PCB in and attach the screws on the bottom of the case.

I will note that the current model is designed so the key caps are a bit recessed. 

I've included a second version with a slightly lower brim so they can stick out more like they do on the Adafruit keypad.  The normal version is ideal for short flat keycaps.  The narrow version is better for slanted caps (like those pictured).

It was difficult to leave the AAA battery accessible.  This was part of the reason the PCB sits so low.  I have pretty big hands, but can still change the batter from the slot on the top.

I left a similar cut out to access the switch on the side.  You will need to insert the PCB at an angle, since the stock switch sticks out a bit. 

Print Settings:

Supports: Yes, Everywhere 

Material: I used PETG, but almost any filament would work.

Infill: 20% (add more if you want it to have more heft)

Resolution: .20