Eddie's Math and Calculator Blog

  Classic RPN Stack Operations Starting Stack: T:  d Z:  c Y:  b X:  a OVER :   Copies b to the Z and X stacks, while leaving ...

TI-84 Evo Basic: Half-Wave Dipole Antenna Length Introduction The length of a half-wave antenna is calculated by: L = λ / 2 =...

TI-84 Evo BASIC: Hydraulic Radius and Chezy-Manning (Circular Pipes) Introduction The program, HYDRAD makes three calculations...

Python: Drawing a Ring of Circles The goal: Draw a number of circles that revolve around the origin (0,0). The center of each circle i...

HP 67 Collection: Oct ober 2026 All examples are done in FIX 4. (DSP 4) Earth's Gravity at a Specific Latitude The true ea...

HP 42S/DM42/Free 42: Two Functions Programmed Three Different Ways Introduction In 1979, Electro Scientific Industries (esi)...