HP13/PHASOR 04b: HP-50g Complex Numbers in Action.

Solving an equation with complex number coefficients. Not in electrical engineering? Don't worry, just get to the equation to solve (KCL1), and take it from there. Using complex numbers to solve an AC circuit, determining the AC currents in different parts of an induction motor and the active and reactive power absorbed from the utility company. The exercise has been set as a numerical exercise. The viewer not interested in electric machines may just accept that the voltage such and such, or current such and such, are represented by corresponding complex numbers and that the expressions are the ones illustrated. The point of the video is to show the flexibility of the HP-50g (and of the HP-49g+, and of the HP-48GX) to work with complex numbers.

[@rolinychupetin]

It does not really matter. THe CPLX directory is a user created one where I collected some mini programs that speed up complex numbers computations, like "toggling between rect and polar" or "toggling between radians and degrees". There are functions that can be found elsewhere among the submenus of the machine, but having them in a menu speeds it up for me. I posted videos on how to do this.

[@dibraniuk]

Perfect! just what is needed. thank you very much!

[@excite236]

hello im in electronics engineering
my question:
there is no CPLX directory in my HOME
does it matter??

[@armagedonc]

thanks for your work.

[@p3nguinish]

Very helpful, thank you.

[@dibraniuk]

how you set up the hp51 for this?

[@rolinychupetin]

Do you mean STC, CTS, and the toggle keys from rectangular to polar, etc.? Just short programs that I have published elsewhere. They use a couple of the HP-50g so called "system flags" (which are like the flags available to users, but are toggled by the calculator during its operation). I think one of the flags is -17 (yes, system flags are represented with a negative number to distinguish them from user flags).

[@dibraniuk]

Yes. its explained in earlier lessons; thanks to this source I'm reviving my memory! Awesome learning resource. thank you

[@rolinychupetin]

Try going to courses.ece.ubc.ca/elec202/linares.html
There, click on FREE SOFTWARE and you will find the source to most of the little HP-50g programs that I use in these videos. Good luck!

[@rolinychupetin]

Not for "FREE SOFTWARE", you don't need login or password for that.

[@Kazshmir]

THANK YOU!

[@thacrackfox]

Unfortunately our classroom doesn't allow calculators that are programmable, because neither does the FE exam.
So, we get to do things the hard way.