Calculators I actually use.

[Maximilian Hohmann]

Hello!

(12-12-2024 10:36 PM)c3d Wrote:  On SwissMicros DM32, DM42 or DM42n with DB48x / DB50x, the key sequence to perform the addition in your example is:

[1][.][2][5][.][ENTER]
[2][.][1][2][.][+]

The second dot transforms something like 1.25 into 1°25′_dms on the command line. You can obviously add seconds and, if you type one more [.], fractions of a second.

A smart way of doing it without (much) extra effort and one more reason to get one of these calculators.

(12-12-2024 03:25 PM)John Garza (3665) Wrote:  And the HP-67/97 has an H.MS+ key...

Yes, and because of that, the HP-67 is one of my favorite calculators. But not for practical everyday use. Too valuable and delicate to be carried around in a (flight) bag and left in a car or plane overnight. And then you need to carry a charger or a spare battery pack.

(12-13-2024 07:04 AM)Steve Simpkin Wrote:  A number of the Casio models such as the fx-115 and fx-991 series can do this as well. They feature an unshifted [° ' "] key that works similar to the shifted equivalent key on the HP Prime.
For example: 1 [° ' "] 25 [° ' "] +2 [° ' "] 12 [° ' "] = 3° 37' 0"

The famous "droplet key"... (the flying students call it „Tröpchentaste“ here) because the symbols look like small drops of water. This is actually a clever solution, the calculators are cheap and often solar-powered.

But Casio had something even better, the LC-403LU "Time Calculations":



If you press the "%" key with the "HMS" second function in the right moment, it switches to time mode permanently (until turned off at least). No extra keystrokes required from there on, all inputs are treated as H.M(.S) values. Just like my smartphone app.
I carried this calculator with me for about a decade, but it has developed an issue with battery contacts and display segments and I had to retire it to the collection. These calculators are quite rare now and unfortunately there never was a successor. Currently there are only two on eBay worldwide and each would cost me over 50 Euros if I include shipping and import duties...

Regards
Max