Scratch built RPN programmers calculator

[EdS2]

Nice! This is the keyboard approach:

Quote:I used soft rubber dome buttons rather than the typical clicky tactile switches. The buttons you see on the front are made from 2 pieces of laser cut black acrylic then plastic-welded into an upside down “T” shape. The flat side pushes down on the button, and the base of the “T” comes up through the top of the panel to replicate the button style of the TI Programmer.