To build a NumWorks calculator, the following parts are required :

scenes/parts.jpg

Top part

Learn about its ribs and bosses.

Bottom part

Holds the PCB and battery.

Keys

Moving parts are always interesting.

Cover

See how it can be both slid and clipped.

If you are interested in the components on the PCB, you can check out the electrical engineering page. The battery and screen are bought ready to assemble.

All the plastic parts are made in polycarbonate. The white ones, and the yellow and black key are injected, whereas the screen protection is machined out of a PC board.