One More HP-67 Program


I've just posted my fourth analog electronics design program to my web site. This one is for designing optimal Sallen-Key low-pass and high-pass filters (as opposed the the Multiple Feedback low-, high-, and band-pass filters designed by the program in the HP-67 EE Pac). Getting this program to fit into 224 steps proved to be challenging, but in the end, I shoehorned it in without compromising the functionality or usability I had intended for it.

The program and documentation can be found at

If you haven't read my earlier HP-67 posts, I'm working on a sort-of-retro electronic project at the moment, so I decided I'd use my retro HP-67 to do all the design calculations. This is the last program I need for this project, so I probably won't post any more HP-67 programs soon.

I am however considering porting these to the HP-41C series (a fairly trivial endeavour), or possibly to the HP-35s. I wonder if there would be an interest in an HP-35s EE Pac (all as a single program with menus, like my Matrix Multi-Tool)?

Stefan Vorkoetter

Edited: 14 Dec 2008, 12:49 p.m.


Very nice work Stefan!

Possibly Related Threads...
Thread Author Replies Views Last Post
  HP Prime: run a program in another program Davi Ribeiro de Oliveira 6 1,170 11-11-2013, 08:28 PM
Last Post: Davi Ribeiro de Oliveira
  HP 65 & HP 67 Program Cards Clayton 2 484 01-06-2011, 05:12 AM
Last Post: Ignazio Cara (Italy)
  My First HP-67 Program: Resistor Networks Stefan Vorkoetter 2 550 11-19-2008, 08:06 PM
Last Post: Jeff Kearns
  Help with an HP-67 Stat Pac I Program Namir 0 321 04-29-2008, 10:30 AM
Last Post: Namir
  HP-41 MCODE: Making an MCODE program call another MCODE program Geir Isene 10 1,392 01-13-2008, 05:58 AM
Last Post: Raymond Del Tondo
  HP-65 or 67 Spaceflight Program Stefan Vorkoetter 22 2,098 08-30-2007, 02:08 PM
Last Post: Stefan Vorkoetter
  HP-67 Diagnostic program Glenn McEnroe 7 976 03-02-2002, 06:05 AM
Last Post: Vassilis Prevelakis
  Repairing pre-recorded program cards for HP-65,HP-67, HP-97, HP-41C Erik Wahlin 3 575 07-20-2000, 03:17 AM
Last Post: Dave Hicks
  HP 67 Program Library James D. Collins 3 608 09-19-1999, 07:56 PM
Last Post: William L. Drylie

Forum Jump: