HP12/PHASOR 04a: HP-50g Complex Numbers Arithmetic

[@jj1221ify]

Thank you SO much! You did an excellent job of summarizing and displaying the usage of phasor math in circuit analysis - a concept that was introduced lightly in my initial circuits course and thus extremely confusing. Thank you very, very much.

[@rolinychupetin]

As in the video on creating variables, and directories, in the HP50g, and the one on programming the calculator: I typed a simple, one instruction "program" to do each one of the complex numbers tasks I need more often, and packed them in a single directory. CPLX is a user made directory, and the softkeys inside are also user made.

[@ricardogarcia7928]

Excelentes tutoriales!!! Ojala y mis profesores explicaran todo como lo hace usted. Espero se encuentre bien... Saludos desde San Cristobal, Venezuela.

[@rolinychupetin]

Gracias, Senor Garcia, por sus elogiosos comentarios y por incluir desde donde escribe. Desde la ciudad andina de SC, Ven. Una vez pase por alli, hace muchos annos.

[@rolinychupetin]

@trese0000 You can use the same program explained there, in HP11: Programming 04, that uses the system flag -16 to toggle between radians mode and degrees mode. Just replace flag -16 for flag -17; replace the command RAD for the command CYTLIN, and replace the command DEG for the command RECT ... then store it in a different variable name, etc.

[@ahmedamineramdani5322]

Where is the menu to toggle rad to deg and xyz to polar?

[@rolinychupetin]

The toggle I use I programmed myself (see the listing at the bottom). From the factory, to change modes, clidk MODE, choose angle form there, etc. A bit slow for my pace. That's why I wrote and typed this instead. Have fun. Hmm, cannot paste it there. KZbin won't let me type comments that long. Go instead to this page and click on FREE SOFTWARE, there you'll find that program and several others. Arghhh! It won't let me include links either. I'll include the link in the video description.

[@altuber99_athlete]

"ALPHA" + Orange SHIFT + "6" = "∡". Thank you!

[@rolinychupetin]

This is the video number fourteen of these series. Those techniques were discussed in one or more of the previous videos.

[@rolinychupetin]

Koramchad: In one of the HP videos dedicated to programming the HP50, I explain how to create a small program to do this, and in another video ... how to assign that program to a key. In that video I explain how to use a flag that tells the HP50 if it is in rect or polar mode, etc.

[@alvarogan]

How do you switch from polar to rectangular so easy? Did you write your own program to switch modes?

[@matinhesari2370]

How do i change the home directory to home cplx?? my 50g only says {home} i need it to be {home cplx}

[@rolinychupetin]

@trese0000 Please watch the video labelled HP14. There I explore how to create a "toggle" between 'radians' mode and 'degrees' mode. It uses the system flag '-17' (negative sign in front, eh?). You can convert that program to a toggle between 'polar' and 'rectangular' mode like this: use flag '-16' (negative sixteen), and replace RAD with CYLIN and replace DEG with RECT. Let me know if it worked.

[@julianfaux9762]

Great video! Very informative and well explained. I tried to access the program you made for the "CPLX" directory however it is asking me for a username and password. Would really love the program as it makes complex arithmetic much easier. Thanks

[@rolinychupetin]

Absolutely. Let me post it here. There are four little programs, the two that you mentioned (to enter complex numbers directly from the stack etc., and a toggle RAD/DEG and another toggle POL/REC. % Get two numbers from the stack and make % a complex number out of them. % By L.Linares 2006 % Usage: Put two numbers on the stack % 2: a % 1: b % This programs behaviour depends on the % (Polar/Rectangular) mode active. If it's % in Rect mode, the program will acquire the % two numbers in levels 2 and 1 of the stack % and create the complex (a,b). If the calculator % is in Polar mode, the program acquires the % two numbers in levels 2 and 1 of the stack % and creates the complex with absolute value % 'a' and angle 'b' (deg or rad depending on % the angle mode active. X C ELSE -> A B NUM A B SIN * ->NUM R->C >> END >> >> ----------------------------------------------- % This is the complement of the program above. % It breaks a complex number in two real numbers % and puts them on the stack. It depends on the % REC/POL mode active. X R ELSE DUP ABS SWAP ARG END >> >> I'll post the two toggles in a separate post. I'm not sure KZbin will allow such long posts.

[@rolinychupetin]

Here are the other two, the toggles RAD/DEG and POL/REC: % Toggle between Degrees and Radians % By L.Linares 2006 % When you type negative 17, do not use the subtraction % key to enter the negative sign. Use the "change sign" % key, key (6,2), "+/-" above the "7" key. There should % not be any space between the negative sign and 17. X > >> ---------------------------------------------- % Toggles between Polar and Rectangular % By L.Linares 2006 X > >>

[@julianfaux9762]

Thank you very much!

[@jim687]

Hi Professor, Wow, your videos are absolutely amazing! Thank you so much for putting them up. I just ran into them after buying my new HP-50G and am learning quite a bit. I tried to go courses.ece.ubc.ca/253/linares.html where the FREE SOFTWARE is and it won't let me download the CPLX software. It is asking me for a username and password. Is CPLX located somewhere I can get it? Best regards, Jim

[@billpramod]

great videos to learn...