Search found 33 matches

by Jim_W
Sat Mar 11, 2023 5:06 pm
Forum: Software Library
Topic: Motion
Replies: 3
Views: 2012

Re: Motion

:lol: I'll let the user do the F = ma - The only other bit of engineering wisdom that I know of is: "You can't push a rope."
- Jim_W
by Jim_W
Fri Mar 10, 2023 8:35 pm
Forum: Software Library
Topic: Motion
Replies: 3
Views: 2012

Motion

Here is a program that no Newtonian should be without. There are five variables that describe motion: Initial Velocity (I), Finial Velocity (F), Time (T), Distance (D), and Acceleration (A). Given any three of these variables, the other two can be calculated. This program gives the user ten options ...
by Jim_W
Wed Mar 08, 2023 7:47 pm
Forum: Software Library
Topic: Catenary Cable
Replies: 0
Views: 2068

Catenary Cable

This program calculates the length and tension of a cable given the horizontal distance it spans and the vertical distance it sags. It uses a reiterative method to solve the problem. The interesting thing here is the HP-42s took about 30 seconds to solve the equation, but the DM42 does it in about 2...
by Jim_W
Tue Mar 07, 2023 6:20 pm
Forum: Software Library
Topic: Irregular Areas
Replies: 0
Views: 2172

Irregular Areas

Here is a little program that calculates the area and centroids of irregular shapes. The shape is placed in the first quadrant of a coordinate graph and the coordinates of each point defining the shape are input into the program. Input the points in a clockwise direction. After inputting all the poi...
by Jim_W
Sun Feb 12, 2023 12:27 am
Forum: DM42
Topic: When to replace DM42 Battery?
Replies: 4
Views: 2734

When to replace DM42 Battery?

My DM42 battery is at 2.76V with one bar missing. At what voltage should I change the battery? Thanks! - Jim_W P.S. I just uploaded two of my aviation programs. They are for flying VFR.
by Jim_W
Sun Feb 12, 2023 12:16 am
Forum: Software Library
Topic: Aviation Navigation
Replies: 0
Views: 1924

Aviation Navigation

Here are a couple of my aviation programs for pilots who like to fly VFR. The first program is “AirNav” (Airport Navigation). 16 favorite airports are stored in a 16X3 matrix. The 3 columns are: Airport Name, Latitude, Longitude. The program shows all 16 airport names on 1 screen. – Use Key6 and Shi...
by Jim_W
Thu Feb 09, 2023 12:16 am
Forum: Software Library
Topic: Lines and Circles Program
Replies: 3
Views: 1884

Re: Lines and Circles Program

You’re welcome, rawi. Dlachieze is right. XASTO is not on the HP42s. It works just like the HP42s’ ASTO but it copies the entire ALPHA register, not just the first six characters. My ‘Line & Circle’ program should work on the HP42s – just abbreviate the long variable names to seven or less lette...
by Jim_W
Sat Feb 04, 2023 8:19 pm
Forum: DM42
Topic: How to print out large program listing?
Replies: 3
Views: 1829

Re: How to print out large program listing?

Thank you, DLachieze and Rudi. That worked! I just posted my first program - "LinCir" - It calculates lines and circles intersections and tangents. Thank you again for your help. - Jim_W
by Jim_W
Sat Feb 04, 2023 8:05 pm
Forum: Software Library
Topic: Lines and Circles Program
Replies: 3
Views: 1884

Lines and Circles Program

DM42 Lines and Circles Program The following program, “LinCir” calculates intersections and tangent points of lines and circles that are placed on a Cartesian coordinate system. The main program has five sub programs which are called from the main menu. The menu labels are: 1) LLint - Line Line Inte...
by Jim_W
Sat Feb 04, 2023 7:02 am
Forum: DM42
Topic: How to print out large program listing?
Replies: 3
Views: 1829

How to print out large program listing?

I'd like to post a rather large program (2346 Bytes) on this form but the SM decoder can't handle that size of a program. Is there any other way to make a text file of a program listing? Or, is there anywhere on the forum where I can upload a .raw file? Thanks, Jim_W