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From the Forums: Homemade 2.8″ Touchscreen ‘Reverse Polish Notation’ Calculator with Teensy 3.2

Thanks to forums user jim_lee for sending this in, with a great write-up on his blog detailing the entire process and inspiration behind the project, along with all the code to power this homemade RPN calculator hosted here on GitHub, and 3D-printer files here on Thingiverse.


 
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