RPN Calculator ( Like the old HP calculators )

thingiverse

I wanted a Reverse Polish Notation calculator, reminiscent of the classic Hewlett-Packard models. So I designed and built my own. Here's a link to the detailed write-up with step-by-step instructions for constructing your own: http://leftcoast.biz/iWeb/Left_Coast/The_calculator.html A video demonstrating it in action can be found at: https://www.youtube.com/watch?v=s-vngUi7-kw The touchscreen interface is based on this product from Adafruit: https://www.adafruit.com/product/1947 For the power system, I used this component from Adafruit: https://www.adafruit.com/products/1944 A compact power switch was also sourced from Adafruit: https://www.adafruit.com/products/805 The battery that powers it is an Adafruit product: https://www.adafruit.com/products/1578 I chose this processor for its capabilities and ease of use: https://www.adafruit.com/products/2756 For audible feedback, I integrated a beeper from Adafruit: https://www.adafruit.com/products/160 To connect all the components together, fine 24-30 awg silicon wire is required. It's essential that it's both thin and flexible. The code for this project can be found in the write-up mentioned earlier, along with links to the source files. Print Settings: Printer Brand: MakerBot Printer: MakerBot Replicator 2 Rafts: No Supports: No Resolution: Standard Infill: 20%