Synth-DIY Yahoo! Groups Archives

Thread

electricity formulas

2009-02-25 by tony

Hi,

I am having problems entering the values into my electricity formulas.
Do I use the soft keys that are in line with the equation(under the
screen) R,I,V,etc.... then input the values??
can anyone help??? step by step please.

thanks

Re: electricity formulas

2009-02-26 by Tim Wessman

> I am having problems entering the values into my electricity formulas.
> Do I use the soft keys that are in line with the equation(under the
> screen) R,I,V,etc.... then input the values??
> can anyone help??? step by step please.

Yes. If you are not in RPN mode I am not sure if it will work.

Get into RPN mode, type the number, press the menu key. It will assign
it with units. Note that you can assign units with prefixes, such as
1.2_mA by typing in just like that. R shift menu or L shift menu will
recall the current value

TW

Re: electricity formulas

2009-02-26 by Juan C.

Hello Tony, let's say you have a resistor of 25 ohm and you apply 120 V in its terminals and you want to find the power P and intensity I.

Press [APPS] 12 [ENTER] or the OK soft key.

Press EQLIB from the soft menu.

Press EQNLI then the down-arrow key, to select Electricity and press [ENTER].

Press the down-arrow key, to select Ohm's Law and Power and press [ENTER].

You can use the up-arrow and down-arrow to look the formulas for this section.

From the soft menu press SOLV, a soft menu with the variables V I R and P appears.

To enter the resistor value, press 25 and then the soft key R.

To enter the Voltage, press 120 and then the soft key V.

To solve for the variable P (Power) press [left-shift] and then the soft key P, the answer is P:576 W.

To solve for the variable I (Intensity) press [left-shift] and then the soft key I, the answer is I:4.8 A.

To try another set of values press the soft key ALL and enter the two knowns and solve for the two unknowns.

Re: electricity formulas

2009-02-26 by tony

Thank you for the help guys.
I can get all the way to the input section (V,R) but when I press
the left shift and the "I" softkey for current, I get a "plot window-
function"???
any ideas?
thanks
Tony

--- In 50g@yahoogroups.com, "Juan C." <jcbuchin@...> wrote:
>
>
> Hello Tony, let's say you have a resistor of 25 ohm and you apply
120 V
> in its terminals and you want to find the power P and intensity I.
>
> Press [APPS] 12 [ENTER] or the OK soft key.
>
> Press EQLIB from the soft menu.
>
> Press EQNLI then the down-arrow key, to select Electricity and press
> [ENTER].
>
> Press the down-arrow key, to select Ohm's Law and Power and press
> [ENTER].
>
> You can use the up-arrow and down-arrow to look the formulas for
this
> section.
>
> From the soft menu press SOLV, a soft menu with the variables V I R
and
> P appears.
>
> To enter the resistor value, press 25 and then the soft key R.
>
> To enter the Voltage, press 120 and then the soft key V.
>
> To solve for the variable P (Power) press [left-shift] and then the
soft
> key P, the answer is P:576 W.
>
> To solve for the variable I (Intensity) press [left-shift] and then
the
> soft key I, the answer is I:4.8 A.
>
> To try another set of values press the soft key ALL and enter the
two
> knowns and solve for the two unknowns.
>

Re: [50g] Re: electricity formulas

2009-02-26 by Fred Hoeldtke

Send in your program for the value of two resistances connected in parallel .

here is one way as a hint. < -> a b < 'a*b/ a+b' > ->num > Try the same in other formats like a RPL

program which can be easier if you like RPL and

you must like RPL to get started. Do not use the

automatic software in the device until you have

simple arithmetic skill.

From: tony

To: 50g@yahoogroups.com

Sent: Thursday, February 26, 2009 2:26 PM

Subject: [50g] Re: electricity formulas

Thank you for the help guys.
I can get all the way to the input section (V,R) but when I press
the left shift and the "I" softkey for current, I get a "plot window-
function"???
any ideas?
thanks
Tony

--- In 50g@yahoogroups. com, "Juan C." <jcbuchin@.. .> wrote:
>
>
> Hello Tony, let's say you have a resistor of 25 ohm and you apply
120 V
> in its terminals and you want to find the power P and intensity I.
>
> Press [APPS] 12 [ENTER] or the OK soft key.
>
> Press EQLIB from the soft menu.
>
> Press EQNLI then the down-arrow key, to select Electricity and press
> [ENTER].
>
> Press the down-arrow key, to select Ohm's Law and Power and press
> [ENTER].
>
> You can use the up-arrow and down-arrow to look the formulas for
this
> section.
>
> From the soft menu press SOLV, a soft menu with the variables V I R
and
> P appears.
>
> To enter the resistor value, press 25 and then the soft key R.
>
> To enter the Voltage, press 120 and then the soft key V.
>
> To solve for the variable P (Power) press [left-shift] and then the
soft
> key P, the answer is P:576 W.
>
> To solve for the variable I (Intensity) press [left-shift] and then
the
> soft key I, the answer is I:4.8 A.
>
> To try another set of values press the soft key ALL and enter the
two
> knowns and solve for the two unknowns.
>

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Re: [50g] Re: electricity formulas

2009-02-26 by Juan Calle

Hello Tony, if you press and hold the left-shit key and then the I soft key you will enter in "Plot Window", so press the left-shit key, don't hold it, and then I soft key. I hope this helps.

Re: electricity formulas

2009-02-27 by tony

Juan,

I tried that also and now the screen that appears is a plot-function
screen with all of the ohms formulas displayed,but no answer??

I wonder if I have something setup wrong in the calculator.

Thanks
Tony

- In 50g@yahoogroups.com, Juan Calle <jcbuchin@...> wrote:

>
> Hello Tony, if you press and hold the left-shit key and then the I

soft key you will enter in "Plot Window", so press the left-shit key,
don't hold it, and then I soft key. I hope this helps.

>

Re: [50g] Re: electricity formulas

2009-03-01 by Juan Calle

Hello Tony, a was looking at the User guide, it seems that you have to set your calculator in RPN mode and flag -117 must be set (this activate the soft menu). In your calculator press [MODE] [+/-] and [ENTER] then 117 [+/-] hold [ALPHA] and pres S F then [ENTER] and try again.