ARC - Arduino RPN Calculator

How to build a scientific calculator with a reverse polish notation logic on the popular arduino microcontroller platform. See more on: In this video you can see the following calculations: * Approximating PI with 22/7 * Inserting * Setting to 6 decimal places (FIX) * Calculating the mean value and standard deviation of 4, 5 and 6 (including SWAP) * Convert a rectangular vector (1,1) to polar and back (swap to change arguments) * Calculating the Gauss normal distribution and density function at 0 (swap to change results) * Starting a clock at 8:16 (and 50 seconds)