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| New to HP48GX |
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| simba15:
So a recent WTB thread enlightened me about the HP48GX series. Very cool! not affordable lol, good thing there is an Android simulator. Using EMU48. I really only want to it for use of the electrical equations. Only thing is I have no idea how to use it! I have scanned through the quick start and programming manuals, and found the EQ LIB but no where shows how to enter data/complete the equation. I always get error (dup error or circular reference or too few arguments) I just want to 120v/10A lol (12ohm) Any advise would be appreciated. (please hold the shame as I am new to the HP48), Thanks. |
| george.b:
--- Quote from: simba15 on February 14, 2022, 05:05:02 pm ---I always get error (dup error or circular reference or too few arguments) I just want to 120v/10A lol (12ohm) --- End quote --- The HP48 series are RPN calculators. If you want to do 120 divided by 10, you enter 120 [ENTER] 10 [รท]. Or, if you meant to do it by using the equation library: Right shift, 3 (EQ LIB), make sure UNITS isn't selected, go to Ohm's Law, A softkey (SOLV), 120, A softkey (V), 10, B softkey (I), left shift, C softkey (R) works for me. |
| simba15:
Yes the RPN style is a bit different at first glance, (but then just look at as a you were doing it by hand) Thanks for the direct key presses it was the left shift that I was missing ( what is this doing? putting into solve mode?) Thanks! |
| Bicurico:
RPN is very easy. You have a stack, which is like four lines. You enter numbers and they get put in the stack. Numbers that are already in the stack get moved one line up. If you now select an operation, it will need one, two or more lines of input. For example: you press multiply. This will multiply the value on line one with number on line two. The result is put in the first line and everything that was after the second line is put in the second line forward, so the void is removed. With the HP48GX the stack is unlimited, so there are not just 4 lines in the stack, but an unlimited amount. Going further, you can have a function that expects the stack to contain certain types of information in each lines. Also, a line in the stack can contain a function. Any line in the stack can be stored in a variable, so you store a number or a program in the same way. After getting used to it, it is very powerful and you won't want to go back to regular calculator programming... I call it lines in the stack, but they have names like X, y, t, s. Not sure what they stand for. |
| BeBuLamar:
They are X,Y,Z and T. T is the top and duplicates itself when it drops. The HP48's don't have names for the stack they are just level 1, 2, 3 etc... as they are basically limited by the amount of memory. I suggest that the OP download the EMU48 version for either the PC or Mac. They work just like the real thing. I have both a 48SX and 48GX but I prefer to use the emulator. |
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