printed_parts: Create README

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+# MiniMax8085
+3D Printable Enclosure for MiniMax8085
+
+## Description
+This is a 3D printable enclosure for MiniMax8085. This design is an updated version of
+[MiniMax 8085 Case by Douglas Martins](https://www.thingiverse.com/thing:3399973),
+which in its turn is based on the [OpenSCAD Parametric Box by FB Aka Heartman/Hearty](http://heartygfx.blogspot.com)
+I've fixed a few dimensions,
+and I also modified it to work with the DC jack and the tactile switch with the projected plunger and 4x4 key top that I use.
+
+![MiniMax8085 Case - Top off](printed_parts/MiniMax8085-Case.jpg)
+
+## 3D Printed Parts
+
+* [Enclosure Bottom](printed_parts/MiniMax8085-Bottom.stl)
+* [Enclosure Back](printed_parts/MiniMax8085-Back.stl)
+* [Enclosure Front](printed_parts/MiniMax8085-Front.stl)
+* [Enclosure Top](printed_parts/MiniMax8085-Top.stl)
+* [OpenSCAD Source Code](printed_parts/MiniMax8085.scad)
+
+### 3D Printing Recommendations
+
+Print these parts with the "flat face" down. Use rotate option in your slicer software to rotate parts accordingly.
+I recommend printing the front and the back parts with the outer side facing the printer bed for more even, higher quality finish.
+Make sure to clean any 3D printing artifacts prior to assembling the case.
+Use a 2.8 mm (7/64") drill bit to clean the holes in the standoffs and the holes in the mounting "ears" on the top and bottom parts.
+Use a 3.2 mm (1/8") drill bit to clean the outer holes on the top and bottom parts.
+
+## Recommended Electronic and Hardware Parts
+
+Part Name      | Description                      | Quantity | Part Number
+-------------- | -------------------------------- | -------- | ------------------
+DC Jack        | Sleeve: 5.5 mm; Center Pin: 2 mm | 1        | Mouser [806-KLDX-0202-A](https://www.mouser.com/ProductDetail/806-KLDX-0202-A)
+Tactile Switch | Right Angle, Projected Plunger   | 1        | Mouser [653-B3F-3152](https://www.mouser.com/ProductDetail/653-B3F-3152)
+Key Top        | 4 mm x 4 mm, Red                 | 1        | Mouser [653-B32-1080](https://www.mouser.com/ProductDetail/653-B32-1080)
+Screw          | M3 x 6 mm, Hex Drive Button Socket Head | 8 | Fastenal [MB2510006A40000](https://www.fastenal.com/products/details/MB2510006A40000)