hpcalc.org - HP Calculator Archive

Other Applications

The first size listed is the downloaded file size and the second size listed is the size on the calculator.

There are 10 files totaling 5,227 KB in this category.

Audio EQ Cookbook for HP 15c CE 1.0.2   (details) Other ENG   607 KB
This HP 15c CE software package is for any audio enthusiast, audio engineer, or software engineer that wants to generate the coefficients for any of the 9 different filters defined in the classic "Audio EQ Cookbook" document. Furthermore, this package also calculates the complex frequency response for any of the 9 filters at any arbitrary frequency. User-memory image (.mem) as well as full program listings in different formats (.15c, .jrn, .txt, etc.) are included in the package. This software can only run in 15.2 mode due to program size. See documentation for more details.
By Pepin Torres. 2024-12-15

Aviation Pac for the HP 15c CE   (details) Other ENG   1,184 KB / 2 KB
A collection of routines useful for aviation. Lets you load waypoints, calculate great circle distance and track, determine intermediate latitude from given longitude, perform altitude correction due to cold temperatures, check fuel systems, give total time between events, convert between metric and imperial units, calculate cross/head/tailwind, and more. Includes PDF documentation.
By Geoff Quickfall. 2025-09-21

Black-Scholes for the HP 12c   (details) Other ENG   434 KB / 2 KB
Quite possibly the best Black-Scholes program for pricing derivative investments.
By Peter Carr and Tony Hutchins. 2025-09-21

Finance Pac for the HP 15c CE   (details) Other ENG   299 KB / 2 KB
A collection of routines useful for finance. Calculates time value of money, weighted average, MM.DDYYYY to Julian Day (and vice versa), sales tax, difference between dates, day of week, net present value, and internal rate of return. Includes PDF documentation.
Author unknown. 2025-09-21

Forward Discrete Fourier Transform for HP 15c CE 1.1.1   (details) Other ENG   202 KB
This HP 15c program implements an N-point forward Discrete Fourier Transform for any real-valued sequence in Matrix A. This relatively small program is for anyone who is in dire need of calculating the Forward DFT of a real-valued sequence with no computer or advanced calculator in sight. This software can run with the HP15c CE in default mode (20-point DFT max) or 15.2 mode (52-point DFT max). The zip file contains a flashable .bin file plus plain-text program listings in common formats (.15c, .jrn, etc.) Full documentation (with instructions, sanity-check example, comments, per-instruction stack state, and execution timing tables) is included as well.
By Pepin Torres. 2025-09-21

Ladder-on-Box Puzzle Solver for HP 15c 1.0   (details) Other ENG   167 KB / 2 KB
This program solves the classic problem of a ladder resting on a square box. This program will solve the problem in two ways: (1) Plugging and chugging or (2) using the 15c SOLVE function. This is for anyone who is ever in dire need of calculating the distance between the tip of the ladder down to the top of the box on which the ladder is resting. In all honesty, this is just a trivial program for one very particular type of problem – unless you really need to find out how high you can climb on a ladder of length L resting on a square box of height c. However, it does two things for me (and maybe you as well): helps get experience coding with the SOLVE function, and gives some exposure/intuition on how to use it to find the roots of a function in general with the 15c.
By Pepin Torres. 2025-09-21

Partial Fraction Expansion for HP 15c CE 1.0   (details) Other ENG   162 KB
This HP 15c software pac calculates the partial fraction expansion of a transfer function as implemented by Wayne Scott in the program "PF" in POLY. Includes PDF documentation.
By Pepin Torres. 2024-12-15

Stopwatch and Countdown Timer for HP 15c 1.0   (details) Other ENG   143 KB / 2 KB
This simple software pac uses the PSE function to implement stopwatch and countdown timer functionality, for anyone who is ever in dire need of (loosely) measuring time intervals.
By Pepin Torres. 2025-09-21

Windowing Function Figures of Merit for HP 15c 1.0   (details) Other ENG   224 KB / 2 KB
This software pac calculates the figures of merit for several windowing functions used in signal processing. It also allows the user to define their own windowing functions and have these figures calculated. Figures of Merit Calculated: Coherent Loss, Equivalent Noise Bandwidth, Processing Loss, Scalloping Loss, Worst-Case Loss (Processing Loss times Scalloping Loss), and Frequency Response evaluated at frequency f.
By Pepin Torres. 2025-09-21

X-GSB : Extended GSB Handler 1.0   (details) Other ENG   1,805 KB / 1 KB
Developed for the HP-34C to extend the nesting level of subroutines to many more, instead of only 6 levels. Also works - with slight or no modifications for other HP calculators. Provided as a PDF.
By Harry de Groot. 2025-09-21

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